# Patent

## Title
Calibration device, calibration program, and calibration method

## Abstract

A calibration device, a calibration program, and a calibration method that can adjust the relation between a distance to an object that is a real image and a view of a stereoscopic image that is a virtual image and create an association therebetween are provided. The calibration device of the present invention includes a display device that can generate a stereoscopic image, a depth level sensor that measures a distance to an object, and an adjusting unit that adjusts the stereoscopic image generated by the display device and a depth level of the object detected by the depth level sensor.

## Background
TECHNICAL FIELD
The present invention relates to a calibration device, a calibration program and a calibration method. More specifically, the present invention relates to a calibration device, a calibration program and a calibration method concerning stereoscopic image display.
BACKGROUND ART
Japanese Patent Publication No. 8-31140 (Patent Literature 1) discloses computer graphics, that is, a high-speed image generation/display method in which a vivid and realistic image is displayed on a screen at a high speed.
The high-speed image generation/display method according to Patent Literature 1 is a high-speed image generation/display method in which a target having a three-dimensional structure is projected and displayed on a two-dimensional screen. In this method, a constituent surface of the target is hierarchically described with the region size being defined as at least one element, in a target coordinate system. Then, when the constituent surface of the target taken from an arbitrary point of view is projected on the two-dimensional screen, the hierarchy level is set with the distance from the origin of a display reference coordinate system or the point of view to an arbitrary point of the target represented in the target coordinate system being defined as at least one parameter.
Japanese Patent Laid-Open No. 2004-126902 (Patent Literature 2) discloses a stereoscopic image generation method and a stereoscopic image generation device that efficiently generate a stereoscopic image with no load on an observer.
In the stereoscopic image generation method according to Patent Literature 2, object data to be planarly displayed, of objects each formed by a polygon having three-dimensional coordinates, is converted into reference camera coordinate system data whose origin is a reference camera, and object data to be stereoscopically displayed, of the objects, is converted into pieces of right-eye and left-eye parallax camera coordinate system data whose origins are respectively right-eye and left-eye parallax cameras having a predetermined parallactic angle therebetween. Then, the object data in the reference camera coordinate system and the object data in the right-eye parallax camera coordinate system are drawn as right-eye image data in a video memory, and the object data in the reference camera coordinate system and the object data in the left-eye parallax camera coordinate system are drawn as left-eye image data in the video memory. Then, the right-eye image data and the left-eye image data drawn in the video memory are composited with each other, and an image mixedly including the stereoscopic object and the planar object is displayed on a stereoscopic display device.
National Publication of International Patent Application No. 2012-533120 (Patent Literature 3) discloses a method using face recognition and gesture/body posture recognition techniques.
The method according to Patent Literature 3 is a method for applying attributes indicative of a user's temperament to a visual representation, the method including: rendering the visual representation of a user; receiving data of a physical space, the data being representative of the user in the physical space; analyzing at least one detectable characteristic to deduct the user's temperament; and applying the attributes indicative of the user's temperament to the visual representation.
National Publication of International Patent Application No. 2012-528405 (Patent Literature 4) discloses a system and a method of supplying multi-mode input to a space or gesture calculation system.
The system according to Patent Literature 4 is a system including: an input device; and a detector that is coupled to a processor and detects an orientation of the input device. The input device has a plurality of mode orientations corresponding to the orientation. The plurality of mode orientations correspond to a plurality of input modes of a gesture control system. The detector is coupled to the gesture control system, and automatically controls selection of an input mode of the plurality of input modes in response to the orientation.
National Publication of International Patent Application No. 2012-521039 (Patent Literature 5) discloses a system, a method, and a computer-readable medium for manipulating a virtual object. The method according to Patent Literature 5 is a method of manipulating a virtual object in a virtual space, including: determining at least one controller that a user utilizes to manipulate the virtual object; mapping the controller to a cursor in the virtual space; determining controller input indicative of the user manipulating the virtual object with the cursor; and displaying a result of the manipulation.
Japanese Patent Laid-Open No. 2012-106005 (Patent Literature 6) discloses an image display device, a game program, and a game control method that enables an observer of the image display device to feel as if the observer could directly manipulate an actually non-existing stereoscopic image. The image display device according to Patent Literature 6 includes: image display means for displaying a parallax image on a display screen; first coordinate calculation means for calculating virtual space coordinates of a stereoscopic image that the observer of the parallax image recognizes between the display screen and the observer; second coordinate calculation means for calculating space coordinates of a manipulation object as a manipulation target of the observer; and event generation means for generating a predetermined event that changes at least one of the parallax image and an image on the display screen other than the parallax image, when a distance between the space coordinates of at least one point of the stereoscopic image calculated by the first coordinate calculation means and the space coordinates of at least one point of the manipulation object calculated by the second coordinate calculation means is equal to or less than a predetermined threshold.
CITATION LIST
Patent Literature
Patent Literature 1: Japanese Patent Publication No. 8-31140
Patent Literature 2: Japanese Patent Laid-Open No. 2004-126902
Patent Literature 3: National Publication of International Patent Application No. 2012-533120
Patent Literature 4: National Publication of International Patent Application No. 2012-528405
Patent Literature 5: National Publication of International Patent Application No. 2012-521039
Patent Literature 6: Japanese Patent Laid-Open No. 2012-106005
SUMMARY OF INVENTION
Technical Problem
The object of the present invention is to provide a calibration device, a calibration program, and a calibration method that can adjust the relation between a distance to an object that is a real image and a view of a stereoscopic image that is a virtual image and create an association therebetween.
Solution to Problem
(1)
A calibration device according to an aspect includes a display device that can generate a stereoscopic image, and a depth level sensor that measures a distance to an object, and an adjusting unit that adjusts the stereoscopic image generated by the display device and a depth level of the object detected by the depth level sensor.
A calibration device according to the present invention includes a display device, a depth level sensor, and an adjusting unit. The display device can generate a stereoscopic image. The depth level sensor measures a distance to an object. The adjusting unit adjusts the stereoscopic image generated by the display device and a depth level of the object detected by the depth level sensor.
In this case, the relation between the distance to the object that is a real image and a view of the stereoscopic image that is a virtual image can be adjusted and the association therebetween can be created.
For example, this adjustment enables visual recognition as if the object that is a real image were in contact with the stereoscopic image that is a virtual image, and visual recognition as if the both images were separated by a predetermined distance.
The calibration includes configuration and adjusting.
The depth level refers to the distance from the depth level sensor to the object that is a detection target.
(2)
With regard to a calibration device according to a second invention, in the calibration device according to the one aspect, the adjusting unit may perform adjustment in such a way that a visual recognition size and position of a shape determined by the object at the depth level detected by the depth level sensor correspond to a visual recognition size and position of the stereoscopic image generated by the display device.
In this case, according to the visual recognition size in a space determined by involvement of the object that is a real image, the visual recognition size of the stereoscopic image that is a virtual image can be adjusted.
(3)
With regard to a calibration device according to a third invention, in the calibration device according to the one aspect and the second invention, the object may be part of a human body.
In this case, the human body can approach the stereoscopic image that is a virtual image by feeling.
(4)
With regard to a calibration device according to a fourth invention, in the calibration device according to the third invention, the part of the human body may be a finger, a palm, a hand, or an arm.
In this case, the use of the finger, the palm, the hand or the arm facilitates the feeling approach to the stereoscopic image that is a virtual image.
(5)
With regard to a calibration device according to a fifth invention, in the calibration device according to any one of the one aspect to the fourth invention, the display device may be a head-mounted display.
In this case, the calibration device can be achieved in a small-sized and attachable mode, for example, in the form of glasses. Furthermore, the calibration device can be made portable. When a deviation occurs in the display or depending on a person who wears the headed-mount display, the adjustment can be made. Furthermore, such a small size can enhance versatility and convenience.
(6)
With regard to a calibration device according to a sixth invention, in the calibration device according to the fourth or fifth invention, the object may be a finger, a palm or a hand, and the adjusting unit may determine a common region that is shared by a stereoscopic region that can be generated as the stereoscopic image and a depth level detection region of the depth level sensor, according to a length from a shoulder joint at a side of the object to the object.
In this case, the common region can be customized according to the difference of physical frames of users.
(7)
With regard to a calibration device according to a seventh invention, in the calibration device according to any one of the one aspect to the sixth invention, the depth level sensor may perform depth level detection of the object by detecting a distance to the object with an infrared ray.
In this case, irradiation and reflection of the infrared ray allows rapid and precise detection of the object so that the depth level can be detected rapidly and precisely.
(8)
A calibration program according to another aspect includes a display process capable of generating a stereoscopic image, a depth level sensor process of measuring a distance to an object, and a position adjustment process of adjusting the stereoscopic image generated in the display process and a depth level of the object detected in the depth level sensor process.
A calibration program according to the present invention includes a display process, a depth level sensor process, and a position adjustment process. In the display process, a stereoscopic image can be generated. In the depth level sensor process, a distance to an object is measured. In the position adjustment process, the stereoscopic image generated in the display process and a depth level of the object detected in the depth level sensor process are adjusted.
In this case, the relation between the distance to the object that is a real image and a view of the stereoscopic image that is a virtual image can be adjusted and the association therebetween can be created.
For example, this adjustment enables visual recognition as if the object that is a real image were in contact with the stereoscopic image that is a virtual image, and visual recognition as if the both images were separated by a predetermined distance.
The calibration includes configuration and adjusting.
Moreover, the depth level refers to the distance from the depth level sensor to the target object that is a detection target.
(9)
With regard to a calibration program according to a ninth invention, in the calibration program according to another aspect, in the position adjustment process, adjustment may be performed in such a way that a visual recognition size and position of a shape determined by the object at the depth level detected in the depth level sensor process correspond to a visual recognition size and position of the stereoscopic image generated in the display process.
In this case, according to the visual recognition size in a space determined by involvement of the object that is a real image, the visual recognition size of the stereoscopic image that is a virtual image can be adjusted.
(10)
With regard to a calibration program according to a tenth invention, in the calibration program according to the other aspect or the ninth invention, the object may be a finger, a palm or a hand, and in this case, the position adjustment process may include a common region determination process. In the common region determination process, a common region that is shared by a stereoscopic region where the stereoscopic image is generated in the display process and a depth level detection region detected in the depth level sensor process is determined according to a length from a shoulder joint at a side of the object to the object.
In this case, the common region can be customized according to the difference of physical frames of users.
(11)
With regard to a calibration program according to an eleventh invention, in the calibration program according to any one of the other aspect to the tenth invention, the depth level sensor process may include an infrared ray detection process of performing depth level detection of the object by detection of the distance to the object with an infrared ray.
In this case, irradiation and reflection of the infrared ray allows rapid and precise detection of the object so that the depth level can be detected rapidly and precisely.
(12)
A calibration method according to still another aspect includes a display step capable of generating a stereoscopic image, a depth level sensor step of measuring a distance to an object, and a position adjustment step of adjusting the stereoscopic image generated in the display step and a depth level of the object detected in the depth level sensor step.
A calibration method according to the present invention includes a display step, a depth level sensor step, and a position adjustment step. In the display step, a stereoscopic image can be generated. In the depth level sensor step, a distance to an object is measured. In the position adjustment step, the stereoscopic image generated in the display step and a depth level of the object detected in the depth level sensor step are adjusted.
In this case, the relation between the distance to the object that is a real image and a view of the stereoscopic image that is a virtual image can be adjusted and the association therebetween can be created.
For example, this adjustment enables visual recognition as if the object that is a real image were in contact with the stereoscopic image that is a virtual image, and visual recognition as if the both images were separated by a predetermined distance.
The calibration includes configuration and adjusting.
The depth level refers to the distance from the depth level sensor to the object that is a detection target.
(13)
With regard to a calibration method according to a thirteenth invention, in the calibration method according to the still another aspect, in the position adjustment step, adjustment may be performed in such a way that a visual recognition size and position of a shape determined by the object at the depth level detected in the depth level sensor step correspond to a visual recognition size and position of the stereoscopic image generated in the display process.
In this case, according to the visual recognition size in a space determined by involvement of the object that is a real image, the visual recognition size of the stereoscopic image that is a virtual image can be adjusted.
(14)
With regard to a calibration method according to a fourteenth invention, in the calibration method according to the still another aspect or the thirteenth invention, the object may be a finger, a palm or a hand, and in this case, the position adjustment step may include a common region determination step. In the common region determination step, a common region that is shared by a stereoscopic region where the stereoscopic image is generated in the display step and a depth level detection region detected in the depth level sensor step is determined according to a length from a shoulder joint at a side of the object to the object.
In this case, the common region can be customized according to the difference of physical frames of users.
(15)
With regard to a calibration method according to a fifteenth invention, in the calibration method according to the still another aspect to the fourteenth invention, the depth level sensor step may include an infrared ray detection step of performing depth level detection of the object by detection of the distance to the object with an infrared ray.
In this case, irradiation and reflection of the infrared ray allows rapid and precise detection of the object so that the depth level can be detected rapidly and precisely.
Advantageous Effects of Invention
The present invention can provide a calibration device, a calibration program, and a calibration method that can adjust the relation between a distance to an object that is a real image and a view of a stereoscopic image that is a virtual image and create an association therebetween.



BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic external front view illustrating an example of a basic configuration of a glasses display device 100 according to an embodiment.
FIG. 2 is a schematic external perspective view illustrating an example of the glasses display device 100.
FIG. 3 is a schematic diagram illustrating an example of a configuration of a control unit 450 of an operation system 400.
FIG. 4 is a flowchart illustrating a processing flow in the operation system 400.
FIG. 5 is a schematic diagram illustrating a concept corresponding to the flowchart of FIG. 4.
FIG. 6 is a schematic perspective view for describing a detection region of an infrared ray detection unit 410 and a virtual display region of a pair of semi-transmissive displays 220.
FIG. 7 is a top view of FIG. 6.
FIG. 8 is a side view of FIG. 6.
FIG. 9 is a schematic diagram illustrating another example of the detection region and the virtual display region.
FIG. 10 is a schematic diagram illustrating another example of the detection region and the virtual display region.
FIG. 11 is a schematic diagram illustrating another example of the detection region and the virtual display region.
FIG. 12 is a schematic diagram illustrating an example of a manipulation region and a gesture region in the detection region.
FIG. 13 is a schematic diagram illustrating an example of the manipulation region and the gesture region in the detection region.
FIG. 14 is a flowchart for describing a calibration process.
FIG. 15 is a schematic diagram illustrating an example of finger recognition.
FIG. 16 is a flowchart illustrating an example of a finger recognition process.
FIG. 17 is a schematic diagram illustrating an example of palm recognition.
FIG. 18 is a schematic diagram illustrating an example of thumb recognition.
FIG. 19 is a schematic diagram illustrating an example of a view of the semi-transmissive display 220 of the glasses display device 100.
FIG. 20 is a schematic diagram illustrating an example (a) of a field of view of the semi-transmissive display 220 and an example (b) of the view of the semi-transparent display 220.
FIG. 21 is a schematic diagram illustrating an example of event generation.
FIG. 22 is a schematic diagram illustrating another example of the event generation.
FIG. 23 is a schematic diagram illustrating another example of the event generation.
FIG. 24 is a schematic diagram illustrating an example of a manipulation on the glasses display device.
FIG. 25 is a schematic diagram illustrating another example of the manipulation on the glasses display device.
FIG. 26 is a schematic diagram illustrating an example of gesture recognition.
FIG. 27 is a schematic diagram illustrating another example of the gesture recognition.
FIG. 28 is a schematic diagram illustrating another example of the gesture recognition.
FIG. 29 is a schematic diagram illustrating another example of the gesture recognition.
FIG. 30 is a schematic diagram illustrating another example of the gesture recognition.
FIG. 31 is a schematic diagram illustrating another example of the gesture recognition.
FIG. 32 is a schematic diagram illustrating another example of the gesture recognition.
FIG. 33 is a schematic diagram illustrating another example of the gesture recognition.



REFERENCE SIGNS LIST


    100 glasses display device
    220 semi-transmissive display
    221 advertisement
    2203D virtual image display region (common region)
    300 communication system
    303 camera unit
    410 infrared ray detection unit
    410c manipulation region
    420 gyroscope unit
    430 acceleration detection unit
    4103D three-dimensional space detection region
    450 control unit
    454 anatomy recognition unit
    456 gesture recognition unit
    460 event service unit
    461 calibration service unit
    701 to 707 view
    900 I/O device
    H1 hand
    H2, H3 shadow
    RP right shoulder joint
    LP left shoulder joint
    OF outer shape
    pn, p0, p1 vertex
    PP1 reference line segment
    pp2 side
    ppk side
    P0 tip point
    P1 base point
    C maximum inscribed circle
    V3 face recognition application screen
    V5 SNS application screen


DESCRIPTION OF EMBODIMENT
Hereinafter, an embodiment of the present invention is described with reference to the drawings. In the following description, the same reference signs are given to the same components. The names and functions thereof are the same. Accordingly, detailed description thereof is not repeated.
Moreover, the present invention is not limitatively applied to the following glasses display device, and can also be applied to other I/O devices, display devices, televisions, monitors, projectors, and the like.
(Configuration Outline of Glasses Display Device)
FIG. 1 is a schematic external front view illustrating an example of a basic configuration of a glasses display device 100 according to an embodiment, and FIG. 2 is a schematic external perspective view illustrating an example of the glasses display device 100.
As illustrated in FIG. 1 or FIG. 2, the glasses display device 100 is a glasses-shaped display device. As described later, the glasses display device 100 is used while being attached to the face of a user.
As illustrated in FIG. 1 and FIG. 2, the glasses display device 100 mainly includes a glasses unit 200, a communication system 300, and an operation system 400.
(Glasses Unit 200)
As illustrated in FIG. 1 and FIG. 2, the glasses unit 200 includes a glasses frame 210 and a pair of semi-transmissive displays 220. The glasses frame 210 mainly includes a rim unit 211 and a temple unit 212.
The pair of semi-transmissive displays 220 is supported by the rim unit 211 of the glasses frame 210.
In the present embodiment, the rim unit 211 of the glasses display device 100 is provided with the pair of semi-transmissive displays 220. Not limited thereto, the rim unit 211 of the glasses display device 100 may be provided with lenses such as normal sunglasses lenses, ultraviolet protection lenses, or glasses lenses, and one semi-transmissive display 220 or the pair of semi-transmissive displays 220 may be separately provided.
Alternatively, the semi-transmissive display(s) 220 may be provided so as to be embedded in part of the lenses.
Further, the present embodiment is not limited to such a glasses type, and can be applied to a hat type and other arbitrary head-mounted display devices as long as the device can be attached to the body of a person and can be arranged within the field of view of the person.
(Communication System 300)
Next, the communication system 300 is described.
The communication system 300 includes a battery unit 301, an antenna module 302, a camera unit 303, a speaker unit 304, a global positioning system (GPS) unit 307, a microphone unit 308, a subscriber identity module card (SIM) unit 309, and a main unit 310.
Note that the camera unit may be provided with a CCD sensor. The speaker unit 304 may be normal earphones, and may be bone-conduction earphones. The SIM unit 309 includes a near field communication (NFC) unit, another contact-type IC card unit, and a contactless IC card unit.
As described above, the communication system 300 according to the present embodiment at least has any of the functions of a mobile phone, a smartphone, and a tablet terminal. Specifically, the communication system 300 has a phone function, an Internet function, a browser function, an e-mail function, an image taking function, and the like.
Accordingly, with the use of the glasses display device 100, the user can use a phone call function similar to that of a mobile phone by means of the communication device, the speaker, and the microphone. Moreover, because the glasses display device 100 is glasses-shaped, the user can make a phone call without using both his/her hands.
(Operation System 400)
Next, the operation system 400 includes an infrared ray detection unit 410, a gyroscope unit 420, an acceleration detection unit 430, and a control unit 450. The infrared ray detection unit 410 mainly includes an infrared ray emission element 411 and an infrared ray detection camera 412.
Next, a configuration, a processing flow, and a concept of the operation system 400 are described. FIG. 3 is a schematic diagram illustrating an example of a configuration of the control unit 450 of the operation system 400.
As illustrated in FIG. 3, the control unit 450 includes an image sensor processor unit 451, a depth map processor unit 452, an image processing unit 453, an anatomy recognition unit 454, a gesture data unit 455, a gesture recognition unit 456, a calibration data unit 457, a composition processor unit 458, an application unit 459, an event service unit 460, a calibration service unit 461, a view service unit 462, a graphics processor unit 463, a display processor unit 464, and a 6-axis sensor driver unit 465.
Note that the control unit 450 does not need to include all the above-mentioned units, and may include one or more necessary units as appropriate. For example, the gesture data unit 455 and the calibration data unit 457 may be arranged on a cloud service, and the composition processor unit 458 may not be particularly provided.
Next, FIG. 4 is a flowchart illustrating a processing flow in the operation system 400, and FIG. 5 is a schematic diagram illustrating a concept according to the flowchart of FIG. 4.
First, as illustrated in FIG. 4, target data is acquired from the infrared ray detection unit 410, and depth computing is performed by the depth map processor unit 452 (Step S1). Then, outer shape image data is processed by the image processing unit 453 (Step S2).
Subsequently, on the basis of the structure of a standard human body, an anatomic feature is recognized from the outer shape image data processed in Step S2, by the anatomy recognition unit 454. As a result, an outer shape is recognized (Step S3).
Further, on the basis of the anatomic feature obtained in Step S3, a gesture is recognized by the gesture recognition unit 456 (Step S4).
The gesture recognition unit 456 refers to gesture data recorded in the gesture data unit 455, and recognizes the gesture from the outer shape whose anatomic feature has been recognized. Note that, although it is assumed that the gesture recognition unit 456 refers to the gesture data recorded in the gesture data unit 455, not limited thereto, the gesture recognition unit 456 may refer to other arbitrary data, and may perform processing without any reference.
In such a manner as described above, a gesture of hands is recognized as illustrated in FIG. 5(a).
Subsequently, the application unit 459 and the event service unit 460 carry out a predetermined event in accordance with the gesture recognized by the gesture recognition unit 456 (Step S5).
As a result, as illustrated in FIG. 5(b), for example, an image is displayed by a picture application. On this occasion, taken image data from the camera unit 303 may be displayed on this screen.
Lastly, the view service unit 462, the calibration service unit 461, the graphics processor unit 463, the display processor unit 464, and the composition processor unit 458 display or virtually display an image on the semi-transmissive displays 220 (Step S6). As a result, skeletons of the hands indicating the gesture are displayed as illustrated in FIG. 5(c), and a composite image that is formed such that the shape and size of a picture coincide with the shape and size of the skeletons is displayed as illustrated in FIG. 5(d).
Note that the 6-axis sensor driver unit 465 always detects signals from the gyroscope unit 420 and the acceleration detection unit 430, and transmits a posture condition to the display processor unit 464.
In the case where the user to whom the glasses display device 100 is attached inclines the glasses display device 100, the 6-axis sensor driver unit 465 always receives signals from the gyroscope unit 420 and the acceleration detection unit 430, and controls image display. In this control, the displayed image may be kept horizontal, and may be adjusted in accordance with the inclination.
(One Example of Detection Region and Virtual Display Region)
Next, a relation between a detection region of the infrared ray detection unit 410 of the operation system 400 and a virtual display region of the pair of semi-transmissive displays 220 is described.
FIG. 6 is a schematic perspective view for describing the detection region of the infrared ray detection unit 410 and the virtual display region of the pair of semi-transmissive displays 220, FIG. 7 is a top view of FIG. 6, and FIG. 8 is a side view of FIG. 6.
In the following, for convenience of description, a three-dimensional orthogonal coordinate system formed by an x-axis, a y-axis, and a z-axis is defined as illustrated in FIG. 6. In the following drawings, an x-axis arrow indicates the horizontal direction. A y-axis arrow indicates the vertical direction or the long axis direction of the user's body. A z-axis arrow indicates the depth level direction. The z-axis positive direction indicates the direction of a higher depth level. The direction of each arrow is the same in the other drawings.
As illustrated in FIG. 6 to FIG. 8, a three-dimensional space detection region (3D space) 4103D in which detection by the infrared ray detection unit 410 of the operation system 400 is possible is provided.
The three-dimensional space detection region 4103D is formed by a conical or pyramidal three-dimensional space extending from the infrared ray detection unit 410.
That is, infrared rays emitted from the infrared ray emission element 411 can be detected by the infrared ray detection camera 412, and hence the infrared ray detection unit 410 can recognize a gesture in the three-dimensional space detection region 4103D.
Moreover, although one infrared ray detection unit 410 is provided in the present embodiment, not limited thereto, a plurality of the infrared ray detection units 410 may be provided, and one infrared ray emission element 411 and a plurality of the infrared ray detection cameras 412 may be provided.
Subsequently, as illustrated in FIG. 6 to FIG. 8, the pair of semi-transmissive displays 220 is visually recognized by the user as a virtual display with a depth in not an actual place of the glasses display device 100 but a virtual image display region 2203D that is a place apart from the glasses display device 100. The depth corresponds to the thickness in the depth level direction (z-axis direction) of a virtual stereoscopic shape of the virtual image display region 2203D. Accordingly, the depth is provided in accordance with the thickness in the depth level direction (z-axis direction) of the virtual stereoscopic shape.
That is, although images are respectively displayed on the semi-transmissive displays 220 of the glasses display device 100 in actuality, a right-eye image is transmitted through the semi-transmissive display 220 on the right-eye side to be recognized by the user in a three-dimensional space region 2203DR, and a left-eye image is transmitted through the semi-transmissive display 220 on the left-eye side to be recognized by the user in a three-dimensional space region 2203DL. As a result, the two recognized images are composited with each other in the brain of the user, whereby the user can recognize the two images as a virtual image in the virtual image display region 2203D.
Moreover, the virtual image display region 2203D is displayed using any of a frame sequential method, a polarization method, a linear polarization method, a circular polarization method, a top-and-bottom method, a side-by-side method, an anaglyph method, a lenticular method, a parallax barrier method, a liquid crystal parallax barrier method, a two-parallax method, and a multi-parallax method using three or more parallaxes.
Moreover, in the present embodiment, the virtual image display region 2203D includes a space region common to the three-dimensional space detection region 4103D. In particular, as illustrated in FIG. 6 and FIG. 7, the virtual image display region 2203D exists inside of the three-dimensional space detection region 4103D, and hence the virtual image display region 2203D corresponds to the common region.
Note that the shape and size of the virtual image display region 2203D can be arbitrarily adjusted by a display method on the pair of semi-transmissive displays 220.
Moreover, as illustrated in FIG. 8, description is given above of the case where the infrared ray detection unit 410 is arranged above (y-axis positive direction) the pair of semi-transmissive displays 220. Even if the arrangement position in the vertical direction (y-axis direction), of the infrared ray detection unit 410 is below (y-axis negative direction) the semi-transmissive displays 220 or the same as the position of the semi-transmissive displays 220, the virtual image display region 2203D similarly includes a space region common to the three-dimensional space detection region 4103D.
(Other Examples of Detection Region and Virtual Display Region)
Next, FIG. 9 to FIG. 11 are schematic diagrams respectively illustrating other examples of the detection region and the virtual display region illustrated in FIG. 6 to FIG. 8.
For example, as illustrated in FIG. 9 to FIG. 11, other I/O devices, display devices, televisions, monitors, and the like may be used instead of the semi-transmissive displays 220 of the glasses display device 100. Hereinafter, other I/O devices, display devices, televisions, monitors, and projectors are collectively referred to as an I/O device 900.
As illustrated in FIG. 9, the virtual image display region 2203D may be outputted in the z-axis negative direction from the I/O device 900, and the three-dimensional space detection region 4103D may be formed in the z-axis positive direction from the infrared ray detection unit 410 that is positioned so as to be opposed to the I/O device 900 in the z-axis direction.
In this case, the virtual image display region 2203D outputted by the I/O device 900 is generated as a space region common to the three-dimensional space detection region 4103D.
Moreover, as illustrated in FIG. 10, the virtual image display region 2203D may be outputted from the I/O device 900, and the three-dimensional space detection region 4103D of the infrared ray detection unit 410 may be formed in the same direction as that of the I/O device 900 (both in the z-axis positive direction with respect to the x-y plane).
Also in this case, the virtual image display region 2203D outputted by the I/O device 900 is generated as a space region common to the three-dimensional space detection region 4103D.
Then, as illustrated in FIG. 11, the virtual image display region 2203D may be outputted in the vertical upward direction (y-axis positive direction) from the I/O device 900. Also in FIG. 11, similarly to FIG. 9 and FIG. 10, the virtual image display region 2203D outputted by the I/O device 900 is generated as a space region common to the three-dimensional space detection region 4103D.
Moreover, although not illustrated, the I/O device 900 may be arranged on the upper side (y-axis positive direction side) of the three-dimensional space detection region 4103D, and the virtual image display region 2203D may be outputted in the vertical downward direction (y-axis negative direction). The virtual image display region 2203D may be outputted in the horizontal direction (x-axis direction). Like a projector or a movie theater, the virtual image display region 2203D may be outputted from the upper back side (the z-axis positive direction and the y-axis positive direction).
(Manipulation Region and Gesture Region)
Next, a manipulation region and a gesture region in the detection region are described. FIG. 12 and FIG. 13 are schematic diagrams illustrating an example of the manipulation region and the gesture region in the detection region.
First, as illustrated in FIG. 12, in general, the user horizontally moves both his/her hands about both his/her shoulder joints (a right shoulder joint RP and a left shoulder joint LP) as the respective centers of rotation, and hence both his/her hands can respectively move within a movement region L and a movement region R surrounded by dotted lines.
Moreover, as illustrated in FIG. 13, in general, the user vertically moves both his/her hands about both his/her shoulder joints (the right shoulder joint RP and the left shoulder joint LP) as the respective centers of rotation, and hence both his/her hands can respectively move within the movement region L and the movement region R surrounded by dotted lines.
That is, as illustrated in FIG. 12 and FIG. 13, the user can move both his/her hands about the right shoulder joint RP and the left shoulder joint LP as the respective centers of rotation, in a three-dimensional space having an imperfect spherical shape (having an arch-like curved surface that is convex in the depth level direction).
Then, an overlapping space region of all of: the three-dimensional space detection region 4103D of the infrared ray detection unit 410; a region in which a virtual image display region can exist (in FIG. 12, the virtual image display region 2203D is illustrated as an example); and a region obtained by integrating the arm movement region L and the arm movement region R is set as a manipulation region 410c. 
Moreover, a portion other than the manipulation region 410c in the three-dimensional space detection region 4103D is set as a gesture region 410g, the portion overlapping with the region obtained by integrating the arm movement region L and the arm movement region R.
Here, the manipulation region 410c has a stereoscopic shape whose farthest surface in the depth level direction is an arch-like curved surface that is convex in the depth level direction (z-axis positive direction), whereas the virtual image display region 2203D has a stereoscopic shape whose farthest surface in the depth level direction is a planar surface. Due to such a difference in the shape of the farthest surface between the two regions, the user physically feels a sense of discomfort during the manipulation. In order to solve the sense of discomfort, adjustment is performed in a calibration process. Moreover, the details of the calibration process are described below.
(Description of Calibration)
Next, the calibration process is described. FIG. 14 is a flowchart for describing the calibration process.
As illustrated in FIG. 12 and FIG. 13, when the user tries to move his/her hand(s) along the virtual image display region 2203D, the user needs to move his/her hand(s) along a plane without any guide. Accordingly, the calibration process is performed to facilitate the manipulation in the virtual image display region 2203D through a reorganization process to be described below.
Moreover, in the calibration process, the finger length, the hand length, and the arm length, which are different for each user, are also adjusted.
Hereinafter, description is given with reference to FIG. 14. First, the glasses display device 100 is attached to the user, and the user maximally stretches both his/her arms. As a result, the infrared ray detection unit 410 recognizes the maximum region of the manipulation region 410c (Step S11).
That is, because the finger length, the hand length, and the arm length are different for each user, the manipulation region 410c is adjusted to suit each user.
Then, in the glasses display device 100, a display position of the virtual image display region 2203D is determined (Step S12). That is, if the virtual image display region 2203D is arranged outside of the manipulation region 410c, a user's manipulation becomes impossible, and hence the virtual image display region 2203D is arranged inside of the manipulation region 410c. 
Subsequently, the maximum region of the gesture region 410g is set within the three-dimensional space detection region 4103D of the infrared ray detection unit 410 of the glasses display device 100 so as not to overlap with the display position of the virtual image display region 2203D (Step S13).
Note that it is preferable that the gesture region 410g be arranged so as not to overlap with the virtual image display region 2203D and be provided with a thickness in the depth direction (z-axis positive direction).
In the present embodiment, the manipulation region 410c, the virtual image display region 2203D, and the gesture region 410g are set in such a manner as described above.
Next, calibration of the virtual image display region 2203D in the manipulation region 410c is described.
In the case where it is determined that the finger(s), the hand(s), or the arm(s) of the user exist around the outside of the virtual image display region 2203D in the manipulation region 410c, such rounding as if the finger(s), the hand(s), or the arm(s) of the user existed inside of the virtual image display region 2203D is performed (Step S14).
As illustrated in FIG. 12 and FIG. 13, in a region near a central part of an image virtually displayed by the semi-transmissive displays 220, if the user maximally stretches both his/her arms, the tips of both his/her hands do not stay within the virtual image display region 2203D and go out thereof in the depth direction (z-axis positive direction). Meanwhile, in an end part of the virtually displayed image, unless the user maximally stretches both his/her arms, it is not determined that the tips of both his/her hands exist within the virtual image display region 2203D.
Hence, if a signal from the infrared ray detection unit 410 is used without being processed, even if the tips of his/her hands go out of the virtual image display region 2203D, the user has difficulty in physically feeling such a state.
Accordingly, in the process of Step S14 in the present embodiment, the signal from the infrared ray detection unit 410 is processed such that the tips of his/her hands that protrude to the outside of the virtual image display region 2203D are corrected to exist within the virtual image display region 2203D.
As a result, in the state where the user maximally stretches or slightly bends both his/her arms, a manipulation from the central part to the end part in the planar virtual image display region 2203D with a depth is possible.
Note that, although the virtual image display region 2203D is formed by a three-dimensional space region whose farthest surface in the depth level direction is a planar surface in the present embodiment, not limited thereto, the virtual image display region 2203D may be formed by a three-dimensional space region that is a curved surface having a shape along the farthest surfaces in the depth level direction of the farthest surface regions L and R in the depth level direction. As a result, in the state where the user maximally stretches or slightly bends both his/her arms, a manipulation from the central part to the end part in the planar virtual image display region 2203D with a depth is possible.
Further, the semi-transmissive displays 220 display a rectangular image in the virtual image display region 2203D. For example, as illustrated in FIG. 5(b), the semi-transmissive displays 220 display a rectangular image (Step S15).
Subsequently, an instruction to the effect that “please surround the displayed image with your fingers” is displayed on the semi-transmissive displays 220 (Step S16). Here, a finger-shaped image may be softly displayed in the vicinity of the image, and a vocal instruction from the speaker may be given to the user instead of such display on the semi-transmissive displays 220.
According to the instruction, the user places his/her fingers on a portion of the image as illustrated in FIG. 5(d). Then, a correlation between the display region of the virtual image display region 2203D and the infrared ray detection unit 410 is automatically adjusted (Step S17).
Note that, in the above example, the user defines a rectangular with his/her fingers, and places the rectangular thus defined on the rectangular of the outer edge of the image. For this reason, the visual recognition size and position of the rectangular defined by his/her fingers is made coincident with the visual recognition size and position of the rectangular of the outer edge of the image. However, the method of defining a shape with fingers is not limited thereto, and may be other arbitrary methods such as a method of tracing the outer edge of the displayed image with a finger and a method of pointing to a plurality of points on the outer edge of the displayed image with a finger. Moreover, these methods may be applied to images having a plurality of sizes.
Note that, although only the case of the glasses display device 100 is taken in the above description of the calibration process, in the case of the I/O device 900, an image may be displayed in the process of Step S11, and a correlation between the displayed image and the infrared ray detection unit 410 may be adjusted in the process of Step S17.
(Finger, Palm, and Arm Recognition)
Next, finger recognition is described, followed by description of palm recognition and arm recognition in the stated order. FIG. 15 is a schematic diagram illustrating an example of the finger recognition. In FIG. 15, (A) is an enlarged view of the vicinity of the tip of a finger, and (B) is an enlarged view of the vicinity of the base of the finger. FIG. 16 is a flowchart illustrating an example of the finger recognition process.
As illustrated in FIG. 16, in the present embodiment, device initialization is performed (Step S21). Then, an infrared ray that has been emitted from the infrared ray emission element 411 and has been reflected on a hand is detected by the infrared ray detection camera 412 (Step S22).
Then, image data is replaced with a distance on a pixel basis by the infrared ray detection unit 410 (Step S23). In this case, the luminance of the infrared ray is inversely proportional to the cube of the distance. A depth map is created using this fact (Step S24).
Subsequently, an appropriate threshold is set to the created depth map. Then, the image data is binarized (Step S25). That is, noise is removed from the depth map.
Subsequently, a polygon having about 100 vertexes is created from the binarized image data (Step S26). Then, a new polygon having a larger number of vertexes pn is created using a low-pass filter (LPF) such that the vertexes become smoother, whereby an outer shape OF of the hand illustrated in FIG. 15 is extracted (Step S27).
Note that, although the number of vertexes that are extracted from the data binarized in Step S26 in order to create a polygon is about 100 in the present embodiment, not limited thereto, the number of vertexes may be 1,000 or other arbitrary numbers.
A convex hull is extracted using Convex Hull from the set of the vertexes pn of the new polygon created in Step S27 (Step S28).
After that, a vertex p0 common between the new polygon created in Step S27 and the convex hull created in Step S28 is extracted (Step S29). The common vertex p0 itself thus extracted can be used as a tip point of the finger.
Further, another point calculated on the basis of the position of the vertex p0 may be used as the tip point of the finger. For example, as illustrated in FIG. 15(A), the center of an inscribed circle of the outer shape OF at the vertex p0 may also be calculated as a tip point P0.
Then, as illustrated in FIG. 15, a vector of a reference line segment PP1 that passes through a pair of right and left vertexes p1 adjacent to the vertex p0 is calculated. After that, a side pp2 connecting each vertex p1 and a vertex p2 adjacent thereto is selected, and a vector of the side pp2 is calculated. Similarly, with the use of the vertexes pn forming the outer shape OF, such a process of obtaining a vector of each side is repeated along the outer periphery of the outer shape OF. The direction of each side and the direction of the reference line segment PP1 calculated in the process of Step S30 are compared with each other, and a side ppk that is close to parallel to the reference line segment PP1 is determined to exist at the position of a valley between fingers. Then, a base point P1 of the finger is calculated on the basis of the position of the side ppk (Step S30). A skeleton of the finger can be obtained by connecting the tip point P0 of the finger and the base point P1 of the finger using a straight line (Step S31). If the skeleton of the finger are obtained, the extending direction of the finger can be recognized.
A similar process is performed on all the fingers, whereby the skeletons of all the fingers are obtained. As a result, the pose of the hand can be recognized. That is, it can be recognized which of the thumb, the index finger, the middle finger, the ring finger, and the little finger is stretched and which thereof is bent.
Subsequently, a difference in the pose of the hand is detected in comparison with image data of several frames taken immediately before (Step S32). That is, movement of the hand can be recognized through the comparison with the image data of the several frames taken immediately before.
Subsequently, the recognized shape of the hand is event-delivered as gesture data to the event service unit 460 (Step S33).
Subsequently, a behavior according to the event is carried out by the application unit 459 (Step S34).
Subsequently, drawing in a three-dimensional space is requested by the view service unit 462 (Step S35).
The graphics processor unit 463 refers to the calibration data unit 457 using the calibration service unit 461, and corrects the displayed image (Step S36).
Lastly, the resultant image is displayed on the semi-transmissive displays 220 by the display processor unit 464 (Step S37).
Note that, although the base point of each finger is detected through the process of Step S30 and the process of Step S31 in the present embodiment, the method of detecting the base point is not limited thereto. For example, first, the length of the reference line segment PP1 is calculated, the reference line segment PP1 connecting the pair of vertexes p1 that are adjacent to the vertex p0 on one side and another side of the vertex p0, respectively. Then, the length of a line segment connecting the pair of vertexes p2 on the one side and the another side is calculated. Similarly, the length of each line segment connecting a pair of vertexes on the one side and the another side is calculated in order from vertexes positioned closer to the vertex p0 to vertexes positioned farther therefrom. Such line segments do not intersect with one another inside of the outer shape OF, and are substantially parallel to one another. In the case where the vertexes at both the ends of such a line segment are in the portion of the finger, the length of the line segment corresponds to the width of the finger, and hence the amount of change thereof is small. Meanwhile, in the case where at least any of the vertexes at both the ends of such a line segment reaches the portion of the valley between the fingers, the amount of change of the length becomes larger. Accordingly, a line segment that has the length whose amount of change does not exceed a predetermined amount and is the farthest from the vertex p0 is detected, and one point on the detected line segment is extracted, whereby the base point can be determined.
(Palm Recognition)
Next, FIG. 17 is a schematic diagram illustrating an example of the palm recognition.
As illustrated in FIG. 17, after the finger recognition is carried out, a maximum inscribed circle C inscribed in the outer shape OF of the image data is extracted. The position of the maximum inscribed circle C can be recognized as the position of the palm.
Next, FIG. 18 is a schematic diagram illustrating an example of thumb recognition.
As illustrated in FIG. 18, the thumb has features different from those of the other four fingers of the index finger, the middle finger, the ring finger, and the little finger. For example, among angles θ1, θ2, θ3, and θ4 mutually formed by straight lines connecting: the center of the maximum inscribed circle C indicating the position of the palm; and the respective base points P1 of the fingers, θ1 concerning the thumb tends to be the largest. Moreover, among angles θ11, θ12, θ13, and θ14 mutually formed by straight lines connecting: the respective tip points P0 of the fingers; and the respective base points P1 of the finger, θ11 concerning the thumb tends to be the largest. The thumb is determined on the basis of such tendencies. As a result, it can be determined whether the image data is a right hand or a left hand or whether the image data is the front side or the back side of the palm.
(Arm Recognition)
Next, the arm recognition is described. In the present embodiment, the arm recognition is carried out after any of the fingers, the palm, and the thumb is recognized. Note that the arm recognition may also be carried out before any of the fingers, the palm, and the thumb is recognized or at the same time as at least any thereof is recognized.
In the present embodiment, a polygon is extracted from a region larger than the polygon of the shape of the hand of the image data. For example, the processes of Steps S21 to S27 are carried out in a length range of 5 cm or more and 100 cm or less and, more preferably, a length range of 10 cm or more and 40 cm or less, so that an outer shape is extracted.
After that, a quadrangular frame circumscribed around the extracted outer shape is selected. In the present embodiment, the shape of the quadrangular frame is a parallelogram or a rectangle.
In this case, because the parallelogram or the rectangle has longer sides opposed to each other, the extending direction of the arm can be recognized from the extending direction of the longer sides, and the direction of the arm can be determined from the direction of the longer sides. Note that, similarly to the process of Step S32, movement of the arm may be detected in comparison with image data of several frames taken immediately before.
Note that, although the fingers, the palm, the thumb, and the arm are detected from a two-dimensional image in the above description, not limited thereto, the infrared ray detection unit 410 may be further provided, or only the infrared ray detection camera 412 may be further provided, and a three-dimensional image may be recognized from two-dimensional images. As a result, the recognition accuracy can be further enhanced.
(View Example of Semi-Transmissive Display)
Next, FIG. 19 is a schematic diagram illustrating an example of a view of the semi-transmissive display 220 of the glasses display device 100.
As illustrated in FIG. 19, on the semi-transmissive display 220 of the glasses display device 100, an advertisement 221 is partially displayed, and a map 222 is further partially displayed. In addition, through the semi-transmissive display 220 of the glasses display device 100, scenery 223 is visually recognized. In addition, weather forecast 224 and time 225 are displayed thereon.
(Description of Field of View)
Next, an example of the view displayed on the semi-transmissive display 220 of the glasses display device 100 is described. FIG. 20(a) is a diagram for describing an example of the field of view of the semi-transmissive display 220, and FIG. 20(b) is a diagram for describing an example of the view of the semi-transparent display 220
As illustrated in FIG. 20, in the present embodiment, the view that can be visually recognized on the glasses display device 100 includes a plurality of views 701 to 707. All the plurality of views are segments each constituting part of an integrated continuous image. Through smooth transition from one visually recognized portion to another visually recognized portion in the continuous image, the plurality of views are switchingly displayed without any discontinuity.
As illustrated in FIG. 20, the views 703, 702, 701, 704, and 705 are provided in the top-bottom direction, and the views 706 and 707 are respectively provided on the right side and the left side of the view 701. Note that, as a matter of course, the views 701 to 707 can be freely deleted or changed by the user, and other views can be further added by the user.
Note that, although the views 701 to 707 are a seamless continuous image in the present embodiment, the views to be switched may be discontinuous images independent of one another.
Specifically, in the case where the posture of the glasses display device 100 is in the horizontal direction, that is, in the case where the glasses display device 100 is attached to the user and where the user faces horizontally forward, the view 701 is displayed.
Subsequently, in the case where the glasses display device 100 is attached to the user and where the user faces obliquely upward at about 30 degrees with respect to a horizontal plane (that is, a plane parallel to the horizontal direction), the view 702 is displayed. That is, on the basis of a signal from at least one of the gyroscope unit 420 and the acceleration detection unit 430 in the glasses display device 100, which direction the user faces is recognized. Note that, for example, a screen of a face recognition application may be displayed as the view 702.
Further, in the case where the user faces obliquely upward at about 45 degrees with respect to the horizontal plane, the view 703 is displayed. Weather forecast may be displayed as the view 703. Moreover, other sky information may be displayed as the view 703, and, for example, a constellation image may also be displayed thereas depending on the time zone.
Similarly, in the case where the glasses display device 100 is attached to the user and where the user faces obliquely downward at about 30 degrees with respect to the horizontal plane, the view 704 (for example, an e-mail screen) is displayed. In the case where the user faces obliquely downward at about 45 degrees with respect to the horizontal plane, the view 705 (for example, a map) is displayed. In the case where the user faces rightward at about 30 degrees with respect to a vertical plane, the view 706 (for example, an Internet browser) is displayed. In the case where the user faces leftward at about 30 degrees with respect to the vertical plane, the view 707 (for example, a phone call screen) is displayed.
Moreover, although the switching among the view 701 to the view 707 is made on the basis of the signal from at least one of the gyroscope unit 420 and the acceleration detection unit 430 in the above description, not limited thereto, the switching thereamong may be made on the basis of the above-mentioned finger, palm, or arm recognition.
Further, when the user is walking, as a condition for making at least any of switches from the view 701 to the view 702, from the view 701 to the view 704, from the view 701 to the view 707, and from the view 701 to the view 706, the level of the signal from at least one of the gyroscope unit 420 and the acceleration detection unit 430 may be set to be higher. This can prevent switching from the view 701 to another view in a short time during the walk. Moreover, such setting that switching is not particularly made when the user suddenly turns around may be provided.
Meanwhile, the view 703 of sky information and the view 705 of map information may be panoramically displayed. In this case, the views 703 and 705 may be scrolled along with rightward and leftward movements.
(Event Generation)
Next, a predetermined event is generated in order to enable the user to easily recognize a difference between the case where the fingers, the palm, the hand, and the arm exist in the manipulation region 410c and the case where the fingers, the palm, the hand, and the arm exist in the gesture region 410g. Hereinafter, the predetermined event is described. FIG. 21 is a schematic diagram illustrating an example of the predetermined event generation, FIG. 22 is a schematic diagram illustrating another example of the event generation in FIG. 21, and FIG. 23 is a schematic diagram illustrating an example of another event generation.
First, as illustrated in FIG. 21, the shape of a hand H1 detected by the infrared ray detection unit 410 is displayed as a virtual image. Further, in the case where the user's hand is far from the manipulation region 410c, a shadow H2 having the shape of the hand H1 is displayed as an example of the event.
This enables the user to easily recognize that his/her hand exists in the gesture region 410g. 
Subsequently, as illustrated in FIG. 22, the shape of the hand H1 detected by the infrared ray detection unit 410 is displayed as a virtual image, and a shadow H3 darker than the shadow H2 is displayed with a small area around the shape of the hand H1. Accordingly, the user can easily recognize that his/her hand more approaches the manipulation region 410c than the case of FIG. 21. Further, in the case where his/her hand exists in the manipulation region 410c, the shadows H2 and H3 are not displayed.
As a result, the user does not need to look for the manipulation region 410c through trial and error or gropingly. That is, the user can easily recognize the distance to the manipulation region 410c on the basis of the darkness of the shadow and the positional difference between the shape of the hand and the shadow.
Moreover, as illustrated in FIG. 23, in the case where the user's hand exists in the manipulation region 410c, circle views H4 may be respectively displayed on the finger tips.
Note that, although the event generation mode of displaying the shadows H2 and H3 and the circle views H4 is described above in the embodiment, not limited thereto, in the case where the user's hand exists in the manipulation region 410c, the displayed image may be rippled, the glasses display device 100 may be provided with a vibration generation device to generate vibrations, a sound may be generated, and the displayed image may be changed by at least any of blinking the displayed image and changing the lighting luminance. For example, the distance to the manipulation region 410c may be represented by the blinking interval, and the distance to the manipulation region 410c may be represented by the lighting luminance. For example, the blinking interval becomes longer with the increasing distance from the manipulation region 410c, and the blinking interval becomes shorter with the decreasing distance therefrom. Alternatively, the lighting luminance becomes lower with the increasing distance from the manipulation region 410c, and the lighting luminance becomes higher with the decreasing distance therefrom. Alternatively, the displayed image is lighted with a darker color (such as red, black, and purple) with the increasing distance from the manipulation region 410c, and the displayed image is lighted with a paler color (such as blue, yellow, and pink) with the decreasing distance therefrom. In this way, an arbitrary event that appeals to human senses (typified by a sense of sight, a sense of hearing, and a sense of touch) may be generated.
(Manipulation on Glasses Display Device)
A usage mode of the glasses display device 100 along with the above-mentioned finger, palm, and arm recognition and the above-mentioned event generation is described.
First, if the user places his/her hand in the manipulation region 410c, his/her hand is recognized, and the user can manipulate a virtual image view. For example, the user can enlarge or reduce the virtual image view, scroll the view, or select a point.
For example, as illustrated in FIG. 24, in the case where the user touches the view of the advertisement 221, an additional view may be displayed.
For example, information on products, services, and the like of a shop is displayed as the advertisement 221. In the case where the user touches the advertisement 221, further detailed information concerning the shop may be additionally displayed. For example, in the case where the shop is a restaurant, a main menu, user's reviews, a price range, and the like of the restaurant may be displayed.
Note that the advertisement 221 may be an image itself obtained by taking the shop by the camera unit 303, and may be recognition result information that is displayed on a shop recognition application screen as a result of automatically starting shop recognition on the basis of the image data of the shop taken by the camera unit 303.
(Display Based on Parody Mode)
Moreover, as illustrated in FIG. 25, when a logo of one company (oo Company) is displayed on the semi-transmissive display 220, if the user touches the logo on the screen, information concerning another competitive or non-competitive company (ΔΔ Company) can be displayed. In this case, for example, a logo of the another company may be displayed as a parody mode.
(Display Based on Gesture Recognition)
Moreover, if the user makes a predetermined hand pose within the gesture region 410g, a preset operation is carried out. FIG. 26 to FIG. 33 are schematic diagrams each illustrating an example of the gesture recognition.
For example, as illustrated in FIG. 26, in the case where the user opens and stretches the thumb and the index finger of the closed hand H1 at 90 degrees to make an L-shaped sign, a menu screen V1 may be displayed between the thumb and the index finger.
Moreover, as illustrated in FIG. 27, in the case where the user opens and stretches the index finger and the middle finger of the closed hand H1 to make a so-called peace sign, a predetermined image V2 may be displayed between the index finger and the middle finger.
Moreover, as illustrated in FIG. 28, in the case where the user makes a greeting action by moving the loosely opened hand H1 in an arrow direction, a face recognition application is automatically activated. On the basis of face data acquired by the camera unit 303, of a person whom the user gives the greeting, the face recognition is automatically started, and information on the name, the company name, the post, when and where the user last met this person, and the like is displayed on a face recognition application screen V3. Further, a flag is set each time the user meets the same person based on the recognition of the face recognition application, and the number of flags may be displayed on the face recognition application screen V3. In this case, the background, color, and the like of the face recognition application screen V3 may be changed depending on the number of flags.
Further, as illustrated in FIG. 29, in the case where the user opens the thumb and the little finger of the closed hand H1 to make a so-called aloha sign and waves the sign in the arrow directions, a phone application is automatically activated, and address book data V4 is displayed. The user can make a phone call to a predetermined person by manipulating the phone application.
Moreover, as illustrated in FIG. 30, in the case where the user draws an alphabetical letter S with a finger of the hand H1, a social networking service (SNS) application is automatically activated, and a SNS application screen V5 can be displayed.
Further, as illustrated in FIG. 31, in the case where the user activates a Chinese character application and causes the application to recognize the index finger of the hand H1, an image of an ink brush is further additionally displayed at the position of the index finger, and the user can practice writing Chinese characters on a Chinese character practice application screen V6.
Moreover, as illustrated in FIG. 32, in the case where the user makes the hand H1 into a hand-knife shape, a knife application is activated, an image of a knife is further additionally displayed at the position of the knife-shaped hand, and the user can cut a virtual image display screen V7.
Moreover, as illustrated in FIG. 33, in the case where the user forms a quadrangle with fingers of both the hands H1, a camera application is automatically activated, and an image of scenery or the like within an image taking frame extracted from the formed quadrangle may be taken on a camera application screen V8.
As described above, in the glasses display device 100 according to the present invention, the calibration service unit 461 adjusts the stereoscopic image and the depth level of the hand H1 detected by the infrared ray detection unit 410 depth level sensor.
In this case, the relation between the distance to the hand H1 that is a real image and a view of the stereoscopic image that is a virtual image can be adjusted and the association therebetween can be created. For example, this adjustment enables visual recognition as if the hand H1 that is a real image were in contact with the stereoscopic image that is a virtual image, and visual recognition as if the both images were separated by a predetermined distance.
The glasses display device 100 can adjust the visual recognition size of the stereoscopic image that is a virtual image according to the visual recognition size in the space determined by involvement of the hand H1 that is a real image.
The hand H1 is part of a human body so that the use of the finger, the palm, the hand or the arm of the human body facilitates the feeling approach to the stereoscopic image that is a virtual image.
The glasses display device 100 is a head-mounted display device so that the glasses display device 100 is achieved in a small-sized and attachable mode. Furthermore, the glasses display device 100 can be made portable. When a deviation occurs in the display or depending on a person who wears the head-mounted display, the adjustment can be performed. Moreover, such a small size can enhance versatility and convenience.
In the glasses display device 100, the calibration service unit 461 may determine the common region that is shared by the virtual image display region 2203D that can be generated as the stereoscopic image and the three-dimensional space detection region 4103D, according to the length from the shoulder joint RP or LP at the side of the hand H1 that is the object to the hand H1.
In this case, the common region can be customized according to the difference of physical frames of users.
Since the glasses display device 100 uses the infrared ray detection unit 410 as the depth level sensor, irradiation and reflection of the infrared ray allows rapid and precise detection of the object so that the depth level can be detected rapidly and precisely.
In the present invention, the glasses display device 100 corresponds to the “calibration device”, the semi-transmissive display 220 corresponds to the “display device”, the infrared ray detection unit 410 corresponds to the “depth level sensor”, the hand H1 corresponds to the “object”, the calibration service unit 461 corresponds to the “adjusting unit”, the right shoulder joint RP and/or the left shoulder joint LP corresponds to the “shoulder joint”, the virtual image display region 2203D corresponds to the “stereoscopic image”, the three-dimensional space detection region 4103D corresponds to the “depth level detection region”, and the common region (which matches the virtual image display region 2203D) corresponds to the “common region”.
A preferred embodiment of the present invention has been described hereinabove, but the present invention is not limited to only the embodiment. It should be understood that various other embodiments are possible without departing from the spirit and scope of the present invention. Further, operations and effects produced by the configuration of the present invention are described in the present embodiment, but these operations and effects are given as examples, and are not intended to limit the present invention.
FIG. 4


    S1 PERFORM DEPTH COMPUTING
    S2 PROCESS TAKEN IMAGE DATA
    S3 RECOGNIZE OUTER SHAPE
    S4 RECOGNIZE GESTURE
    S5 CARRY OUT EVENT
    S6 VIRTUALLY DISPLAY IMAGE

FIG. 14

    S11 RECOGNIZE MAXIMUM REGION
    S12 DETERMINE DISPLAY POSITION OF VIRTUAL IMAGE DISPLAY REGION
    S13 SET MAXIMUM REGION OF GESTURE REGION
    S14 PERFORM ROUNDING PROCESS
    S15 DISPLAY RECTANGULAR IMAGE
    S16 DISPLAY INSTRUCTION TO USER
    S17 AUTOMATICALLY ADJUST CORRELATION

FIG. 16

    S21 PERFORM DEVICE INITIALIZATION
    S22 DETECT BY INFRARED RAY CAMERA
    S23 REPLACE WITH DISTANCE
    S24 CREATE DEPTH MAP
    S25 BINARIZE IMAGE DATA
    S26 CREATE POLYGON
    S27 EXTRACT OUTER SHAPE
    S28 CREATE CONVEX HULL
    S29 CALCULATE TIP POINT
    S30 CALCULATE BASE POINT
    S31 EXTRACT SKELTON
    S32 COMPARE WITH PREVIOUS SEVERAL FRAMES
    S33 DELIVER EVENT
    S34 BEHAVE IN ACCORDANCE WITH EVENT
    S35 REQUEST DRAWING
    S36 CORRECT DISPLAYED IMAGE
    S37 PERFORM DISPLAY PROCESS

FIG. 20

    #1 FACE RECOGNITION

FIG. 24

    #1 PRODUCT
    #2 MENU
    #3 REVIEW
    #4 PRICE RANGE


FIG. 25 #1 oo Company #2 PARODY MODE #3 ΔΔ Company
FIG. 26


    #1 MENU
    #2 CHARACTER INPUT
    #3 PICTURE DRAWING
    #4 CAMERA

FIG. 28

    #1 NAME
    #2 COMPANY NAME
    #3 POST
    #4 WHEN AND WHERE USER LAST MET THIS PERSON
    #5 HOBBIES AND FAVORITES

FIG. 29

    #1 ADDRESS
    #2 SEARCH
    #3 MR. A
    #4 MR. B
    #5 MR. C
    #6 MR. D
    #7 MR. E

FIG. 31

    #1 CHINESE CHARACTER APPLICATION

FIG. 32

    #1 KNIFE APPLICATION

FIG. 33

    #1 CAMERA APPLICATION

## Claims

1. A calibration device comprising:
a display device that can generate a stereoscopic image;
a depth level sensor that measures a distance to an object; and
a calibration service unit that adjusts the stereoscopic image generated by the display device and a depth level of the object detected by the depth level sensor wherein
the calibration service unit determines a common region that is shared by a stereoscopic region that can be generated as the stereoscopic image and a depth level detection region of the depth level sensor, according to a length from a shoulder joint at a side of the object to the object.

2. The calibration device according to claim 1, wherein the calibration service unit performs adjustment in such a way that a visual recognition size and position of a shape determined by the object at the depth level detected by the depth level sensor correspond to a visual recognition size and position of the stereoscopic image generated by the display device.

3. The calibration device according to claim 1, wherein the object is part of a human body.

4. The calibration device according to claim 3, wherein the part of a human body is a finger, a palm, a hand, or an arm.

5. The calibration device according to claim 1, wherein the display device is a head-mount display.

6. The calibration device according to claim 1, wherein the depth level sensor performs depth-level detection of the object by detecting a distance to the object with an infrared ray.

7. A calibration system comprising:
a memory to store computer executable instructions; and
a processor to execute the computer executable instructions to perform processes, comprising:
a display process capable of generating a stereoscopic image;
a depth level sensor process of measuring a distance to an object; and
a position adjustment process of adjusting the stereoscopic image generated in the display process and a depth level of the object detected in the depth level sensor process,
wherein the object is a finger, a palm or a hand, and

the position adjustment process includes a common region determination process of determining a common region that is shared by a stereoscopic region where the stereoscopic image is generated in the display process and a depth level detection region detected in the depth level sensor process, according to a length from a shoulder joint at a side of the object to the object.

8. The calibration system according to claim 7, wherein in the position adjustment process, adjustment is performed in such a way that a visual recognition size and position of a shape determined by the object at the depth level detected in the depth level sensor process correspond to a visual recognition size and position of the stereoscopic image generated in the display process.

9. The calibration system according to claim 7, wherein the depth level sensor process includes an infrared ray detection process of performing depth level detection of the object by detection of the distance to the object with an infrared ray.

10. A calibration method comprising:
a display step capable of generating a stereoscopic image;
a depth level sensor step of measuring a distance to an object; and
a position adjustment step of adjusting the stereoscopic image generated in the display step and a depth level of the object detected in the depth level sensor step,
wherein the object is a finger, a palm or a hand, and
the position adjustment step includes a common region determination step of determining a common region that is shared by a stereoscopic region where the stereoscopic image is generated in the display step and a depth level detection region detected in the depth level sensor step, according to a length from a shoulder joint at a side of the object to the object.

11. The calibration method according to claim 10, wherein in the position adjustment step, adjustment is performed in such a way that a visual recognition size and position of a shape determined by the object at the depth level detected in the depth level sensor step correspond to a visual recognition size and position of the stereoscopic image generated in the display step.

12. The calibration method according to claim 10, wherein the depth level sensor step includes an infrared ray detection step of performing depth level detection of the object by detection of the distance to the object with an infrared ray.