Patent Publication Number: US-10324043-B2

Title: Method for pre and post image association in fiber optic inspection

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation Application of U.S. patent application Ser. No. 14/124,115, filed Dec. 5, 2013, which is a National Stage Application of PCT/US2012/043452, filed on Jun. 21, 2012, which is based upon and claims the benefit of priority from U.S. Provisional Patent Application No. 61/499,440, filed Jun. 21, 2011, the disclosures of all of which are incorporated by reference herein in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Apparatuses and methods consistent with the exemplary embodiments relate to a fiber optic connector inspection display system, and more particularly, a fiber optic connector inspection display system which is capable of associating and linking related images and displaying the same. 
     2. Related Art 
     Fiber and connector contamination is a key contributor to network downtime and there is a need to document that fibers and connectors have been properly cleaned during installation and subsequent network activation and maintenance tasks. Clean fiber optic components are a requirement for quality connections between fiber optic equipment. One of the most basic and important procedures for the maintenance of fiber optic systems is to clean the fiber optic equipment. 
     Any contamination in the fiber connection can cause failure of the component or failure of the whole system. Even microscopic dust particles can cause a variety of problems for optical connections. A particle that partially or completely blocks the core generates strong back reflections, which can cause instability or failure in the laser system. Dust particles trapped between two fiber faces can scratch the glass surfaces. Even if a particle is only situated on the cladding or the edge of the end-face, it can cause an air gap or misalignment between the fiber cores which significantly degrades the optical signal. 
     Typically, technicians are given very basic tools, such as miniature optical microscopes or crude video microscopes to perform inspections, but these can neither document results nor provide pass/fail analysis. Thus, some fibers may not be inspected at all and those that are at the mercy of the subjective decisions of field technicians. 
     Further, if the technicians are given a task to inspect and take a snap shot of condition of the equipment at one point in time and come back in the future at a different point in time to repeat the same task, there is no easy way to linking the related snapshots of the equipment to compare the images efficiently. 
     SUMMARY 
     One or more exemplary embodiments may overcome the above disadvantages and other disadvantages not described above. However, it is understood that one or more exemplary embodiment are not required to overcome the disadvantages described above, and may not overcome any of the problems described above. 
     Accordingly, aspects of one or more exemplary embodiments may be achieved by providing a fiber optic connector inspection display system including: a input unit which receives fiber end-face images; a display mode selection unit which allows a user to select as least one of an image capture mode or an image review mode; a capturing unit which captures the fiber end-face images; a storing unit which stores the captured images as a first still image and a second still image; a display unit which displays the received fiber end-face images from the input unit or the stored first and second still images, and a control unit which stores each of the first and second still images with a user defined identification label, and the control unit way further label the each of the first and second still images with a preset image pair mode label if the user selects a preset image pair mode. 
     The control unit may couple the first still image and the second still image if the first and the second still image has the same user defined identification label and the same preset image pair mode label. 
     The preset image pair mode may include at least one of before/after, input/output, cleaning, mating and documentation preset. 
     The fiber optic connector inspection display system way further include a filtering unit which fibers the stored images based on the at least one of the before/after, the input/output, the cleaning, the mating and the documentation preset. 
     Another aspects of one or more exemplary embodiments may be achieved by providing a method of analyzing fiber optic connector inspection images, the method including: selecting an image capture mode; receiving fiber end-face images; capturing the fiber end-face images as a first still image and a second still image; storing each of the first and second still image with a user defined identification label; storing the first and second still image with a preset image pair mode label if a user selects a preset image pair mode, selecting an image review mode; and displaying the received fiber end-face images from the input unit or she stored first and second still images. 
     The method may further include coupling the first still image and the second still image if the first and the second still image has the same user defined identification label and the same preset image pair mode label. 
     The preset image pair mode label may include at least one of before/after, input/output, cleaning, mating and documentation. 
     The method may further include filtering the stored images based on the at least one of the preset image pair mode of before/after, input/output, cleaning, mating and documentation. 
     Still another aspects of one or more exemplary embodiments may be achieved by providing A non-transitory computer-readable recording medium storing a computer program causing a fiber optic connector inspection display system to execute a method of analyzing fiber optic connector inspection images, the method including: selecting an image capture mode; receiving fiber end-face images; capturing the fiber end-face images as a first still image and a second still image; storing each of the first and second still image with a user defined identification label; storing the first and second still image with a preset image pair mode label if a user selects a preset image pair mode, selecting art image review mode; and displaying the received fiber end-face images from the input unit or the stored first and second still images. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1A-1D  show a front, a top, a bottom and a side view of a fiber optic connector inspection display system. 
         FIG. 2A  shows an input fiber scope which can be used with the fiber optic connector inspection display system shown in  FIGS. 1A-1D . 
         FIG. 2B  shows a rear view of the fiber optic connector inspection display system shown in  FIGS. 1A-1D  with a cable connection to attach the input fiber scope shown in  FIG. 2A . 
         FIG. 3  shows a block diagram of a fiber optic connector inspection display system according to an exemplary embodiment. 
         FIG. 4  shows a display unit displaying images that are organized and stored in a storage unit of a fiber optic connector inspection display system. 
         FIGS. 5A-5C  show a display unit which can display a live image mode, a capture mode and a image review mode. 
         FIG. 6  shows a flowchart illustrating the method of linking a pair of related images using a fiber optic connector inspection display system. 
         FIGS. 7A-7G  show an example of how a technician can, in step by step, document a before and after cleaning of fiber optic equipment. 
         FIGS. 8A-8D  show another example of how a technician can, in step by step, document a deterioration of a fiber optic equipment over time. 
     
    
    
     DETAILED DESCRIPTION 
     The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses and/or systems described herein. Various changes, modifications, and equivalents of the systems, apparatuses and/or methods described herein will suggest themselves to these of ordinary skill in the art. Descriptions of functions and structures are omitted to enhance clarity and conciseness. 
       FIGS. 1A-1D  show a front, a top, a bottom and a side view of a fiber optic connector inspection display system  10 . The fiber optic connector inspection system  10  which provides unique new capabilities not supported by any existing video inspection system. The fiber optic connector inspection system is a hand-held display/processor unit (DPU) that can be used with an inspection input fiber scope  20  as shown in  FIG. 2A . This solution will give network installation and maintenance personnel installers the ability to inspect and document the condition of fiber connectors and patchcords. 
     The fiber optic connector inspection system as shown in  FIGS. 1A-1D  includes a touch screen display  1 , a protective boot  2 , a power button  3 , a power port  4 , a universal serial bus (USB) function port  5 , a charger indicator  6  and a flash card slot  8 . 
     The touch screen display  1  contains on-screen controls and menus and is used to show live, captured and saved fiber end-face images. The touch screen display  1  also allows a user to select live image setting, image capture modes, general settings and image manager. The boot  8  is a shock-absorbing rubber boot to protect the touch screen display. The power button  3  is used not only for powering up and shutting down the fiber optic connector inspection display system  10  but also for enabling sleep mode to save battery without completely shutting off the fiber optic connector inspection display system  10 . 
     The power port  4  is an interface for the AC power adaptor and charger and the universal serial bus (USB) function port  5  allows connection to the inspection input fiber scope  20  as shown in  FIG. 2  through a converter cable  11  shown in  FIG. 2A . The charger indicator  6  indicates whether the AC adaptor (not shown) is connected to the fiber optic connector inspection display system  10  and different colors indicates whether a battery (not shown) is charging (red) or is fully charged (green). The flash card slot  8  is used for retain a flash card which can be used for storing and transferring fiber end-face images to another system such as a personal computer or a laptop. In addition to the flash card mechanism so described, fiber end-face images may also be transferred, via a USB memory device connected to the USB function port  5 . 
     The fiber optic connector inspection display system  10  may also include a loop  7  which can be used as a hanger or a bail  9 , which can be used as a tilt stand or another hanger. The fiber optic connector inspection display system  10  may also include a cable retainer  12  which is designed to provide strain relief for the converter cable  11  shown in  FIG. 2A . 
       FIG. 2A  shows an input fiber scope  20  which can be used with the fiber optic connector inspection display system  10  shown in  FIGS. 1A-1D . The input fiber scope  20  shown in  FIG. 2A  is one of many fiber scope equipment available in the market.  FIG. 2A  also shows different types of probe head  25  which can be used for different fiber optic equipments. 
       FIG. 3  shows a block diagram of a fiber optic connector inspection display system according to an exemplary embodiment. Referring to  FIG. 3 , the fiber optic connector inspection display system  10  according to the present embodiment includes an input unit  110  receiving fiber end-face images from a input fiber scope unit  20 , a capture unit  120  capturing the fiber end-face images through the input fiber scope unit, a display mode selection unit  130 , a control unit  140 , a storing unit  150  which stores the captured images and a display unit  160  which can display various modes selected from the mode selection unit and display images accordingly. 
     The display mode selection unit  130  allows a user to select from at least one of live image mode, snapshot mode, image explore mode and image review mode as shown in  FIG. 4  and  FIGS. 5A-5C . In the live image mode as shown in  FIG. 5A , the user can view a live view of the fiber optic equipment of interest. This mode allows the user to zoom or pan to focus on the area of interest. Once the user determines that documentation is required on the fiber optic equipment of interest, the user may switch from the live image mode to the snapshot mode. In snapshot mode as shown in  FIG. 5B , the user can capture an image of interest and the fiber optic connector inspection display system  10  provides preview of the captured image. Once the user saves the captured image, the user can find the stored images via image explore mode as shown in  FIG. 4 . In the image explore mode, the user has options to save images into specific folders and delete files. Finally, as shown in  FIG. 5C , the user can view the stored images selected from the image explorer view in  FIG. 4 . 
     Hereinafter, the control unit  140  will be described in detail. The control unit controls the a input fiber scope unit  20 , a capture unit  120 , a display mode selection unit  130 , a storing unit  150  and a display unit  160  based on the user instructions through a touch screen of the fiber optic connector inspection display system  10 . In addition to the basic function of controlling other units of the fiber optic connector inspection display system  10  as described above, the control unit  140  provides a user an image pair mode function. 
     By enabling the image pair mode allows the user to select a preset pair mode prior to fibers inspection, to inspect fiber end-faces and to save captured images with the selected pairing preset label for simplified identification, recall and review. In order to use advantages of the image pair mode, the user first selects a preset image pairing mode prior to fibers inspection. Table 1 below shows the available image presets. However, the presets of exemplary embodiment shown in Table 1 are not limited thereto and the one of ordinary skill in the art may create other image pair presets 
     
       
         
           
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Image Pair Preset 
                 Description 
               
               
                   
               
             
            
               
                 Before/after 
                 This is a general preset for any before/after  
               
               
                   
                 fiber inspection comparisons 
               
               
                 Input/output 
                 This is a general preset for any input/output  
               
               
                   
                 fiber inspection comparison 
               
               
                 Cleaning 
                 This preset is used for inspection fiber end- 
               
               
                   
                 faces before and after cleaning 
               
               
                 Mating 
                 This preset is used for inspection of mating  
               
               
                   
                 connector and bulkhead 
               
               
                 Documentation 
                 This preset is used for as-built/as-found  
               
               
                   
                 fiber installation and maintenance 
               
               
                   
               
            
           
         
       
     
     After the image pair mode is enabled, captured images are stored with the selected pairing mode label as shown in Table 1 (Before/After, Input/Output, Cleaning, Mating and Documentation) for image pair identification. Finally, to simplify images recall and review, stored images may be optionally filtered by the user-selected image pair mode in the image explorer display mode. 
     Hereinafter, an illustration is provided as to how a technician takes advantage of the image pairing mode feature to document a service call with reference to  FIGS. 7A-7G . Contaminated or damaged fiber optic connectors have been identified as the root cause of many network outages. Upon receipt of a customer complaint, the technician is dispatched to customer premise. If the contamination or the fiber end-face damage is encountered, the technician should unequivocally document the contamination of the damage. 
     As shown in  FIG. 7A , using the Settings tab  201 , the technician chooses “Cleaning” pair mode, and insert the file identification as a file prefix  202 . For example, technician may use work order number (# WO567) as the file prefix. After disassembling a suspect fiber optic connector, using image video probe, the user can view a “Before Cleaning” image of one of the mating portions of the connector as shown in  FIG. 7B  in a live image view mode  203 . Referring to  FIG. 7C , using Snapshot capability  204 , the technician captures the image and store the “Before Cleaning” image in the storage unit  150 . Once the technician cleans the suspect fiber end-face and then the technician views the end-face image after the cleaning. As shown in  FIG. 7D , the technician selects “After Cleaning” and sets “File #” to 1. If the technician is satisfied with cleanliness of the fiber end-face, use Snapshot capability to capture the image and store the “After Cleaning” image in the storage unit  150  as shown in  FIG. 7E . Repeat this process with the other mating portion of fiber connector using File #2. As a result, two paired images are stored in the storage unit  150  as shown in  FIG. 7F . In  FIG. 7F , by selecting “Cleaning” in the filter setting  205 , only pairs with “Cleaning,” as a pair mode are displayed. As shown in  FIG. 7G , opening the “WO567_002” from  FIG. 7F  allows the technicians to see a comparison of the before (topmost) and after (bottommost) images of the file. In this case the view sees that all of the dirt and contamination present in the before view has been removed. 
     Hereinafter, another illustration is provided as to how a technician takes advantage of the image pairing mode feature to associate related images with reference to  FIGS. 8A-8D . In the current illustration, a technician dispatched to install a fiber option equipment at an arbitrary customer location. As an illustration purpose only, “2 West Main Street” will be used as the address of the easterner location. 
     Similar to the illustration above, using the Settings tab  301 , the technician chooses “Documentation” pairing mode (As Built/As Found) as shown in  FIG. 8A . The technician sets “2 West Main Street” as the File Prefix  302  to easily identify the images to be taken. The technician installs the fiber equipment and documents fiber end-face image cleanliness by selecting “As Built” and File number “1” as shown in  FIG. 8B . One year later, in this illustration, the technician receives a customer complaint about the service at “2 West Main Street.” The technician creates a pairing of the “As found” with the original “As Built” by simply selecting the documentation mode, using the 2 West Main Street prefix and selecting the “As Found” button. The technician views fiber end-face and finds the equipment contaminated as shown in  FIG. 8C . Realizing that he must document his findings he chooses “As Found” and selects file #001. This process results in the creating of the image pair for 2 West Main St. The technician views the pair in the image browser as shown in  FIG. 8D . Viewing the image pair simultaneously provides unequivocal proof that the “As Built” condition of the fiber end-face was somehow degraded through misuse, tampering, environmental conditions or other mechanisms. 
     So far, examples of coupling images based on “Before Cleaning” with “After Cleaning” and “As Built” with “As Found.” However, the examples shown are not limited thereto and any other criteria can be used to couple the images and view the images simultaneously. 
     Hereinafter, a method of analyzing fiber optic connector inspection images according to an embodiment will be described with reference to  FIG. 8 . 
     First, a user selects an image capture mode (S 1 ) and views fiber end-face images (S 2 ). Then the user captures the fiber end-face images as still images (S 3 ). If a preset image pair mode is selected (S 4 ), label the captured image with a preset image pair mode and a user-defined prefix (S 5 ). However, if the preset image pair mode is not selected (S 4 ), label the captured image with only the user-defined prefix (S 6 ) and store the captured image in the storage unit  150  (S 7 ). 
     Then, the fiber optic connector inspection display system  10  displays the captured image (S 8 ). Here, if the user selects the captured images with the preset image pair mode, the display system  10  can display the pair of captured images simultaneously as shown in  FIGS. 5C and 7G . 
     Although a few exemplary embodiments have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. The exemplary embodiments should be considered in a descriptive sense only and not for purposes of limitation.