Patent Publication Number: US-2023148866-A1

Title: Determining biometric data using an array of infrared illuminators

Description:
PRIORITY INFORMATION 
     This application is a Continuation of U.S. application Ser. No. 17/569,746, filed on Jan. 6, 2022, which is a Continuation of U.S. application Ser. No. 17/092,678, filed on Nov. 9, 2020, which issued as a U.S. Pat. No. 11,219,371 on Jan. 11, 2022, the contents of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates generally to an array of infrared (IR) illuminators, and more particularly, to methods, apparatuses, and systems related to determining biometric data of a user using an array of IR illuminators. 
     BACKGROUND 
     An IR illuminator can be, for example, a device that emits IR light. IR is a region of the electromagnetic radiation spectrum. Wavelengths in the IR region range from about 700 nanometers (NM) to 1 millimeter (mm). A dot projector can project IR light as a grid pattern. An IR camera, also known as a thermographic camera or thermal imaging camera, can capture IR light and form a heat zone image using the IR light. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    illustrates an example of an apparatus for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. 
         FIG.  2    illustrates an example of an apparatus for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. 
         FIG.  3    illustrates an example of an apparatus for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. 
         FIG.  4    is a flow diagram of a method for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure includes methods, apparatuses, and systems related to determining biometric data using an array of IR illuminators. An example method includes projecting a number of IR dots on a user using a dot projector and an array of IR illuminators, capturing an IR image of the number of IR dots using an IR camera, comparing a number of pixels of the captured IR image to a number of corresponding pixels of a baseline IR image using a processing resource, and determining biometric data of the user at least partially based on comparing the captured IR image to the baseline IR image using the processing resource. The determined biometric data can include a user&#39;s heart rate, temperature, calorie burn rate (e.g., number of calories burned over a period of time), physical state, and/or emotional state. The user&#39;s health (e.g., physical state) can be determined based on a heat distribution (e.g., intensity parameter per pixel) in the IR image of the user&#39;s face and the user&#39;s athletic state (e.g., physical state) can be determined based on a heat distribution in the IR image of the user&#39;s muscles. For example, a muscle being exercised will generate more heat than a muscle not being exercised. In some examples, the user&#39;s emotional state can be at least partially determined based on a user&#39;s posture, facial expression, sounds, and/or gestures. 
     As used herein, a user can be one or more users. The IR image of the user can include an entire body of a user or a portion of the body of the user. A portion of the body of the user can be a face, head, eye, ear, nose, leg, arm, or hand, for example. 
     The baseline IR image can also include an entire body or a portion of a body. The baseline IR image can be a neutral condition of the user, an average IR image of the user created by a number of previously taken IR images of the user, or an IR image of an average person from a library, for example. 
     A single IR illuminator can emit IR light over an area and an array of IR illuminators (e.g., a plurality of IR illuminators) can emit IR light over a greater area. For example, where a single IR illuminator could emit IR light over a user&#39;s face, an array of IR illuminators could emit IR light over a user&#39;s entire body. Covering a user&#39;s entire body with IR light can allow the IR camera to capture an IR image of the user&#39;s entire body. 
     In a number of embodiments, a first portion of the number of IR dots can be projected by the dot projector on a first portion of a user&#39;s body and a second portion of the number of IR dots can be projected by the dot projector on a second portion of the user&#39;s body. In some examples, the first portion of the number of IR dots can be a first diameter and the second portion of the number of IR dots can be a second diameter. A dot diameter can be smaller when a dot is being projected on to a portion of the user&#39;s body where more detail in the IR image is desired and a dot diameter can be larger when a dot is being projected on to a portion of the user&#39;s body where less detail in the IR image is desired. The dot projector may project dots with smaller diameters on to a portion of the user&#39;s body where the user&#39;s body has more changes in contour, color, and/or shape. For example, the dot projector may project dots with smaller diameters on to a user&#39;s face and project dots with larger diameters on to a user&#39;s torso. In some examples, decreasing an IR dot diameter allows more dots to be projected in an area, which creates a more detailed IR image of the user in that area. 
     As such, the number of IR dots the dot projector projects on a portion of a user&#39;s body can be dependent on where more detail in the IR image is desired. The dot projector can project a first portion of the number of the IR dots on a first portion of the user&#39;s body and project a second portion of the number of the IR dots on a second portion of the user&#39;s body, where the first portion of the number of the IR dots is greater than the second portion of the number of IR dots. The dot projector may project a greater number of the IR dots on a portion of the user&#39;s body where the user&#39;s body has more changes in contour, color, and/or shape. For example, the dot projector may project a greater number of IR dots on to an ear of the user than on to a chin of the user because the user&#39;s ear has more contours than the user&#39;s chin. 
     In a number of embodiments, an axicon or an array of axicons can be used in conjunction with an array of IR illuminators, a dot projector, and/or an IR camera. An axicon is a cone shaped optical element with a circular aperture. The axicon can prevent light diffraction. An IR light can diffract and lose its intensity with distance. Placing an axicon in front of the dot projector will make the IR light diffraction free and allow the IR light to maintain its intensity over a greater distance. In some examples, an apparatus including an array of IR illuminators, a dot projector, an array of axicons, and an IR camera can project and capture an IR image of a number of IR dots at a greater distance away from the apparatus than an apparatus including the array of IR illuminators, the dot projection, and the IR camera without the array of axicons. 
     The IR camera can capture the IR light emitted by the array of IR illuminators and form an IR image (e.g., a heat zone image) using the number of IR dots. In a number of embodiments, a number of IR cameras can be used to capture a number of IR images. For example, each of the number of IR cameras can be located at different locations to capture IR images of the user on different sides of the user and/or different angles of the user. 
     As used herein, “a number of” something can refer to one or more of such things. For example, a number of computing devices can refer to one or more computing devices. A “plurality” of something intends two or more. Additionally, designators such as “X” and “Y”, as used herein, particularly with respect to reference numerals in the drawings, indicates that a number of the particular feature so designated can be included with a number of embodiments of the present disclosure. 
     The figures herein follow a numbering convention in which the first digit or digits correspond to the drawing figure number and the remaining digits identify an element or component in the drawing. Similar elements or components between different figures may be identified by the use of similar digits. For example, reference numeral  102  may reference element “ 2 ” in  FIG.  1   , and a similar element may be referenced as  202  in  FIG.  2   . In some instances, a plurality of similar, but functionally and/or structurally distinguishable, elements or components in the same figure or in different figures may be referenced sequentially with the same element number (e.g.,  104 - 1 ,  104 - 2 , and  104 -X in  FIG.  1   ). As will be appreciated, elements shown in the various embodiments herein can be added, exchanged, and/or eliminated so as to provide a number of additional embodiments of the present disclosure. In addition, the proportion and the relative scale of the elements provided in the figures are intended to illustrate various embodiments of the present disclosure and are not to be used in a limiting sense. 
       FIG.  1    illustrates an example of an apparatus  110  for determining biometric data of a user  106  in accordance with a number of embodiments of the present disclosure. The apparatus  110  can be, but is not limited to, a television, a smart television, a gaming system, a piece of fitness equipment, a smart mirror, a computing device, a personal laptop computer, a desktop computer, a smart phone, a tablet, a wrist worn device, a digital camera, and/or redundant combinations thereof. The apparatus  110 , as illustrated in  FIG.  1   , can include an infrared illuminator  100 , a dot projector  102 , a number of axicons  104 - 1 ,  104 - 2 , . . . ,  104 -X, and an IR camera  108 . 
     Biometric data can include a user&#39;s heart rate, temperature, calorie burn rate, physical state, and/or emotional state, for example. The user&#39;s emotional state can be at least partially determined based on a user&#39;s posture, facial expression, sounds, and/or gestures. 
     One or more of the IR images can be used to determine a user&#39;s heart rate, temperature, calorie burn rate, posture, facial expression, and/or gestures. The one or more IR images can be created by projecting a number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y on a user  106  using a dot projector  102  and an IR illuminator  100  and capturing an IR image of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y using an IR camera  108 . 
     The IR illuminator  100  can emit IR light. The IR illuminator  100  can be a single IR illuminator and/or an array of IR illuminators. As previously described, an array of IR illuminators can emit IR light over a greater area than a single IR illuminator. For example, a single IR illuminator can emit IR light over a portion of a user&#39;s body and an array of IR illuminators can emit IR light over a number of users. 
     The dot projector  102  utilizing the IR light emitted by the IR illuminator  100  can project the number of dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y directly on the user  106  and/or a number of users from the dot projector  102  and/or from the dot projector  102  through the number of axicons  104 - 1 ,  104 - 2 , . . . ,  104 -X 6666 . For example, a first portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can be projected by the dot projector  102  on a first user and a second portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can be projected by the dot projector  102  on a second user. 
     In a number of embodiments, a first portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can be projected by the dot projector  102  on a first portion of the body of the user  106  and a second portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can be projected by the dot projector  102  on a second portion of the body of the user  106 . For example, the first portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can include IR dots  105 - 1  and  105 - 2  and the second portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can include IR dot  105 -Y. 
     The first portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can be a first diameter and the second portion of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y can be a second diameter. In some examples, the diameter of an IR dot can be determined by the distance the IR light is traveling from the IR projector  102 . For example, the farther the IR light travels, the larger the IR dot will be, as such, the IR projector  102  can project a smaller IR dot when a user  106  is farther away and a larger IR dot when the user  106  is closer to the IR projector  102 . 
     Although not shown in  FIG.  1   , an IR dot diameter can be smaller when an IR dot is being projected on to a portion of the user&#39;s body where more detail in the IR image is desired and an IR dot diameter can be larger when an IR dot is being projected on to a portion of the user&#39;s body where less detail in the IR image is desired. The dot projector  102  may project dots with smaller diameters on to a portion of the user&#39;s body where the user&#39;s body has more changes in contour, color, and/or shape. For example, the dot projector  102  may project IR dots with a smaller diameter on to a user&#39;s face and project IR dots with a larger diameter on to a user&#39;s body (e.g., neck, shoulders, chest, torso, arms, and/or legs, etc.). In some examples, decreasing an IR dot diameter allows more IR dots to be projected in an area, which creates a more detailed IR image of the user  106  in that area. 
     The number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y the dot projector  102  projects on a portion of a user&#39;s body can be dependent on where more detail in the IR image is desired. The dot projector  102  can project a first portion of the number of the IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y on a first portion of the user&#39;s body and project a second portion of the number of the IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y on a second portion of the user&#39;s body. The dot projector  102  may project a greater number of the IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y on a portion of the user&#39;s body where the user&#39;s body has more changes in contour, color, and/or shape. For example, the dot projector  102  may project a greater number of the IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y on to an ear of the user  106  than on to a chin of the user  106  because the user&#39;s ear has more contours than the user&#39;s chin. 
     In a number of embodiments, an axicon  104  or an array of axicons  104 - 1 ,  104 - 2 , . . . ,  104 -X can be used in conjunction with an IR illuminator  100 , dot projector  102 , and/or IR camera  108 . An axicon  104  is a cone shaped optical element with a circular aperture. The axicon  104  can prevent light diffraction. An IR light can diffract and lose its intensity with distance. Placing an axicon  104  in front of the dot projector  102  will make the IR light diffraction free and allow the IR light to maintain its intensity over a greater distance. In some examples, an apparatus  110  including an IR illuminator  100 , a dot projector  102 , an array of axicons  104 - 1 ,  104 - 2 , . . . ,  104 -X, and an IR camera  108  can project and capture an image of a number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y at a greater distance away from the apparatus  110  than an apparatus without the array of axicons  104 - 1 ,  104 - 2 , . . . ,  104 -X. 
     The IR camera  108  can capture the IR light emitted by the IR illuminator  100  and capture an IR image of the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y. In a number of embodiments, a number of IR cameras  108  can be used to capture the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y. For example, each of the number of IR cameras  108  can be located at different locations to capture the number of IR dots  105 - 1 ,  105 - 2 , . . . ,  105 -Y on different sides of the user  106 . 
       FIG.  2    illustrates an example of an apparatus  210  for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. Apparatus  210  can correspond to apparatus  110  in  FIG.  1   . The apparatus  210  can include an infrared illuminator  200 , a dot projector  202 , and an IR camera  208 . The infrared illuminator  200 , the dot projector  202 , and the IR camera  208  can correspond to the infrared illuminator  100 , the dot projector  102 , and the IR camera  108 , respectively in  FIG.  1   . As illustrated in  FIG.  2   , apparatus  210  can further include a processing resource  212  and a memory  222 . 
     The memory  222  can be any type of storage medium that can be accessed by the processing resource  212  to perform various examples of the present disclosure. For example, the memory  222  can be a non-transitory computer readable medium having computer readable instructions (e.g., computer program instructions) stored thereon that are executable by the processing resource  212  to produce an IR light via an IR illuminator, project a number of IR dots on a user via the dot projector using the IR light produced by the IR illuminator, capture an IR image of the number of IR dots via an IR camera, compare a number of pixels of the captured IR image to a number of corresponding pixels of a baseline IR image, and determine biometric data of the user at least partially based on comparing the captured IR image to the baseline IR image. 
     In a number of embodiments, one or more sensors, not illustrated in  FIG.  2   , can be included in the apparatus  210 . For example, the apparatus  210  can include a visible light camera to capture a visible light image. A captured visible light image can be used with the captured IR image to determine biometric data of a user. For example, a captured visible light image can include a facial expression that can be used to determine an emotional state of a user. However, facial expressions may mean different emotional states based on a person&#39;s geographical location, race, and/or culture. Accordingly, a captured IR image can be used in conjunction with a captured visible light image to determine a true emotional state of a user. 
     The processing resource  212  can receive the one or more IR images from the IR camera  208  and/or from memory  222 . In some examples, the processing resource  212  can combine an IR image from the IR camera  208  with an IR image from the memory  222 . For example, the IR image from the IR camera  208  can be less detailed than the IR image from memory  222  because it was captured from a greater distance away from the user than the IR image from the memory  222 . The processing device  212  can use the IR image from the memory  222  with the IR image from the IR camera  208  to create more accurate biometric data of the user. 
     In a number of embodiments, the memory  222  can store biometric data of the user. In some examples, the biometric data can be used when playing video games, watching a movie, watching instructional videos, and/or fitness videos. 
     The memory  222  can be volatile or nonvolatile memory. The memory  222  can also be removable (e.g., portable) memory, or non-removable (e.g., internal) memory. For example, the memory  222  can be random access memory (RAM) (e.g., dynamic random access memory (DRAM) and/or phase change random access memory (PCRAM)), read-only memory (ROM) (e.g., electrically erasable programmable read-only memory (EEPROM) and/or compact-disc read-only memory (CD-ROM)), flash memory, a laser disc, a digital versatile disc (DVD) or other optical storage, and/or a magnetic medium such as magnetic cassettes, tapes, or disks, among other types of memory. 
     Further, although memory  222  is illustrated as being located within apparatus  200 , embodiments of the present disclosure are not so limited. For example, memory  222  can be located on an external apparatus (e.g., enabling computer readable instructions to be downloaded over the Internet or another wired or wireless connection). 
       FIG.  3    illustrates an example of an apparatus  310  for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. Apparatus  310  can correspond to apparatus  210  in  FIG.  2   . The apparatus  310  can include an IR illuminator  300 , a dot projector  302 , an axicon  304 , an IR camera  308 , a processing resource  312 , and a memory  322 . The IR illuminator  300 , the dot projector  302 , the IR camera  308 , the processing resource  312 , and the memory  322  can correspond to the infrared illuminator  200 , the dot projector  202 , the IR camera  208 , the processing resource  212 , and the memory  222 , respectively in  FIG.  2   . The axicon  304  can correspond to the axicon  104  in  FIG.  1   . As illustrated in  FIG.  3   , apparatus  310  can further include a user interface  314 , an acoustic sensor  316 , a proximity sensor  320 , an AI accelerator  324 , a speaker  328 , and a light  329 . 
     An AI accelerator  324  can include hardware, software, and/or firmware that is configured to perform operations (e.g., logic operations, among other operations) associated with AI operations using one or more AI models. An AI model can be stored in memory  322  and/or external to the apparatus  310 . In a number of embodiments, an AI model can be trained on and/or external to the apparatus  310 . Data from a user or sample data can be used to train an AI model. In some examples, a number of heart rates, heart rate conditions (e.g., frequency and/or amplitude of a heart beat), temperatures, calorie burn rates, physical states and/or emotional states of a person with corresponding baseline IR images can be used to train an AI model. For example, a baseline IR image identified as a person with an angry emotional state can be used to train an AI model. The baseline IR image of an angry person will include more heat generated by blood flow than an IR image of a relaxed person. For example, the baseline IR image of an angry person will include a number of pixels within a particular color value range. 
     The AI accelerator  324  can include train parameters to train the AI model. Train parameters can include intensity and luminance distribution, intensity or heat profile at different wavelengths (e.g., spectra), spatial distribution comparison on high-pass and/or low-pass filtered data, a difference between two IR images in Fourier domain, and/or feature extraction and classification. 
     Data from a captured IR image can be inputted into an AI model. The data can include color values of each pixel of the captured IR image. The color values of each of the number of pixels can be compared to color values of each of a number of pixels from one or more baseline IR images. For example, the AI model can compare a number of pixels of a captured IR image to a number of corresponding pixels of a baseline IR image. The number of pixels of the captured IR image can correspond to the number of pixels of the baseline IR image if the number of pixels of the captured image and the number of pixels of the baseline IR image are from the same particular area of a face, for example. If the number of pixels of the captured IR image are within a particular color value range of the number of pixels of the baseline image then biometric data of a user (e.g., a heart rate, temperature, calorie burn rate, physical state, and/or emotional state) may be the same or similar to the biometric data identified with the baseline IR image. 
     In some examples, biometric data of a user in a captured IR image can be determined by extrapolating biometric data of a baseline IR image. For example, a baseline IR image can be associated with a temperature. The temperature associated with the captured IR image can be determined by comparing the captured IR image to the baseline IR image to determine a difference value and using the difference value and the temperature associated with the baseline IR image to calculate the temperature associated with the captured IR image. The user interface  314  can be generated by the apparatus  310 . The user interface  314  can be a graphical user interface (GUI) that can provide and/or receive information to and/or from the user of the apparatus  310 . The user interface  314  can be shown on a display of the apparatus  310 . 
     In a number of embodiments, the user interface  314  can be generated in response to an input from a user. A user input to generate the user interface  314  can include powering on the apparatus  310  and/or selecting an application, for example. 
     Once the user interface  314  is generated on the apparatus  310 , the user interface  314  can display a video. In some examples, the video can be a video game, a movie, an instructional video, or a fitness video. In a number of embodiments, AI operations can be performed on the biometric data using an AI accelerator  324  and the video can be modified in response to the output of the AI operation. 
     The video can be modified in response to biometric data of the user. For example, the AI accelerator  324  can output a command to slow down, speed up, and/or shutoff the video in response to performing an AI operation on the biometric data of the user. In a number of embodiments, the video can be slowed down or sped up in response to the determined biometric data of the user being outside of a particular range. The particular range can be a healthy heartrate range, for example, if the user&#39;s heartrate is below the particular range the video can be sped up and if the user&#39;s heartrate is above a particular range the video can be slowed down. An IR image can capture the size of a vein and over a number of IR images track the vein getting larger and smaller to determine the heartrate of the user. 
     The AI accelerator  324  could determine that the user is getting bored of a video game by analyzing the one or more captured IR images and speed up the video game. The AI accelerator  324  could determine that the user was getting bored by quantifying the rate at which the user looks away from the user interface  314 . For example, the AI accelerator  324  can determine, using a first number of IR images over a first period of time, that the user looks away from the user interface  314  a first number of times and determine, using a second number of IR images over a second period of time, that the user looks away from the user interface  314  a second number of times. If the second number of times the user looks away from the user interface  314  is greater than the first number of times, the AI accelerator  324  can output a command to speed up the game to try to reengage the user with the video game. 
     In some examples, the story, quest, and/or goal of the video can be changed in response to the biometric data of the user. For example, the processing resource  312  can determine that the user has reached their heartrate goal by calculating the user&#39;s heartrate using a number of IR images over a period of time. In response to the user meeting their heartrate goal, the AI accelerator  324  can create a new fitness goal for the workout video. 
     The user interface  314  can also display messages. Messages can be displayed in response to outputs of an AI operation. For example, the AI accelerator  324  can determine that the user&#39;s heart rate is irregular, and the user is in need of medical attention. In response to the AI operation determining the user is in need of medical attention, a message that the user is in need of medical attention can be displayed on the user interface  314 . 
     The apparatus  310  can include an acoustic sensor  316 . The acoustic sensor  316  can detect sounds produced by a user. Detected sounds can include, but are not limited to, speaking, breathing, and/or footsteps, for example. The language, volume, and/or pitch of the sound captured by the acoustic sensor  316  can be analyzed by the AI accelerator  324 . In a number of embodiments, AI operations can be performed on the sound data using the AI accelerator  324 . For example, the AI accelerator  324  can determine that the user is exhausted by performing an AI operation on the sound data. The sound data can include a recording of the breathing of the user over a period of time. In response to the AI accelerator  324  determining that the user is breathing faster over the period of time, the AI accelerator  324  can output a command to slow down the video and/or change the goal of the video, for example. 
     A movement of the user can be detected using the proximity sensor  320 . An AI operation can be performed on the data collected by the proximity sensor  320  from the user&#39;s movement. The AI accelerator  324  can determine a speed of the user&#39;s movement, the force of the user&#39;s movement, and/or the direction of the user&#39;s movement. In some examples, the AI accelerator  324  can determine an outcome of a story, quest, and/or goal based on the determined speed, the determined force, and/or the determined direction of the user&#39;s movement. For example, a user&#39;s swing may have been in the right direction and had enough force to sink a putt and move the user on to a new hole in a golf video game. 
     A speaker  328  can be included in apparatus  310 . The speaker  328  can produce a sound and/or sounds based on an output of an AI operation. For example, the AI accelerator  324  can perform an AI operation on biometric data of the user and determine a physical and/or an emotional state of the user. The biometric data can include an IR image of the user with a slouched posture and/or a frowning facial expression. Based on the IR image, the AI accelerator  324  can determine that the user is sad. In response to the AI accelerator  324  determining that the user is sad, the speaker  328  can play an upbeat song and/or play the user&#39;s favorite song, for example. 
     The apparatus  310  can include a light  329 . Similar, to the speaker  328 , the light  329  can emit a type of light based on an output of the AI operation. For example, the AI accelerator  324  can perform an AI operation on biometric data of the user and determine a physical and/or an emotional state of the user. The biometric data can include a number of IR images with the user&#39;s eyes closed. Based on the number of IR images, the AI accelerator  324  can determine that the user is sleeping. In response to the AI accelerator  324  determining that the user is sleeping, the light  329  can emit a soft night light glow. 
       FIG.  4    is a flow diagram of a method  430  for determining biometric data of a user in accordance with a number of embodiments of the present disclosure. At block  432 , the method  430  can include projecting a number of IR dots on a user using a dot projector and an array of IR illuminators. 
     The IR illuminator can emit IR light. In some examples, the IR illuminator can emit varying intensities of IR light. The dot projector can utilize the IR light emitted by the IR illuminator to project the number of dots on the user and/or a number of users. The dot projector can project the number of dots in varying sizes. In some examples, the dot projector can change the number of dots projected. 
     At block  434 , the method  430  can include capturing an IR image of the number of IR dots using an IR camera. The IR camera can capture the IR light emitted by the IR illuminator. The IR image can be a heat zone image, for example. 
     At block  436 , the method  430  can include comparing a number of pixels of the captured IR image to a number of corresponding pixels of a baseline IR image using a processing resource. In some examples, one or more captured IR images can be compared to one or more baseline IR images. The one or more captured IR images and/or the one or more baseline IR image can be from the IR camera and/or memory. 
     At block  438 , the method  430  can include determining biometric data of the user at least partially based on comparing the captured IR image to the baseline IR image using the processing resource. In a number of embodiments, the biometric data can be used when playing video games, watching a movie, watching instructional videos, and/or fitness videos. For example, a video game, a movie, an instructional video, and/or a fitness video can be modified in response to biometric data. 
     Although specific embodiments have been illustrated and described herein, those of ordinary skill in the art will appreciate that an arrangement calculated to achieve the same results can be substituted for the specific embodiments shown. This disclosure is intended to cover adaptations or variations of one or more embodiments of the present disclosure. It is to be understood that the above description has been made in an illustrative fashion, and not a restrictive one. Combination of the above embodiments, and other embodiments not specifically described herein will be apparent to those of skill in the art upon reviewing the above description. The scope of the one or more embodiments of the present disclosure includes other applications in which the above structures and methods are used. Therefore, the scope of one or more embodiments of the present disclosure should be determined with reference to the appended claims, along with the full range of equivalents to which such claims are entitled. 
     In the foregoing Detailed Description, some features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the disclosed embodiments of the present disclosure have to use more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment.