KR20050015719A - Testing device for video processor and testing method thereof - Google Patents

Abstract

PURPOSE: A checking device and a checking method of an image processing apparatus are provided to capture a displayed image, and to compare the captured image with a prestored image to check whether an image processing apparatus malfunctions, thereby conducting a more exact test. CONSTITUTION: A capturing unit(100) captures an image signal outputted from an image processing apparatus(200). A controller compares the captured image with a prestored image, and decides whether the image processing apparatus(200) malfunctions. An error display(300) displays whether the image processing apparatus malfunctions, according to decided results. The capturing unit(100) captures a portion of the outputted image, and supplies a user interface. The user interface consists of an operation determine area for determining whether the capturing unit(100) is operated, and a capture setup area for setting an area to be captured.

Description

Inspection device and inspection method of an image processing device {TESTING DEVICE FOR VIDEO PROCESSOR AND TESTING METHOD THEREOF}

The present invention relates to an apparatus for inspecting an image processing apparatus, and more particularly, to an apparatus for inspecting and inspecting an image processing apparatus to capture an image displayed by the image processing apparatus and determine whether the image processing apparatus is defective. It is about.

With the development of audio and video signal processing technologies, various types of audio or video formats have been proposed, and video storage media or video playback media using the formats have emerged. As a moving picture storage medium, there is an optical storage medium such as a video CD or a DVD, and a moving picture reproducing medium includes a DVD player or a digital camcorder.

In general, an image processing apparatus is a device capable of reproducing an image and sound recorded in advance, and reproduces an image and sound recorded on a magnetic tape or a image and sound recorded on a digital video disk (DVD). It will play a role.

In particular, two or more different devices connected to an integrated system are called a combination system or a combo system, which is called a combo for short.

An example of the combination system is a DVDP / VCR combo that allows the DVDP and VCR functions to be combined.

As shown in FIG. 1, a general image processing apparatus includes a VCR unit 10 for reproducing an image and sound recorded on a magnetic tape, and recording an externally received signal onto the magnetic tape, and a DVD. And a DVDP unit 20 for reproducing the recorded video and sound.

In addition, the image processing device is connected to a TV 30 for outputting the image and sound reproduced in the VCR unit 10 and the DVDP 20 unit, the image processing device is an external device such as a camcorder 40 ) To receive video and sound from the external device 40 to perform recording and playback.

In addition, the image processing device may be provided on a separate external manipulation device 50 such as a remote controller or the like, which may be installed on the exterior of the image processing device. The operation buttons formed in the control mode switch between the VCR unit 10 and the DVDP 20 and the individual functions of the VCR unit 10 and the DVDP 20 can be controlled.

Such an image processing device is required to check the operation state during production of the product, and in order to inspect the image processing device, the inspector plays the magnetic tape or the DVD through the image processing device.

In this case, when the magnetic tape or the DVD is reproduced and displayed on the TV 30, the inspector examines the screen displayed through the TV screen through the user's naked eye.

However, when the image processing apparatus is inspected through the visual inspection of the inspector as described above, since the inspection process is simple and repetitive, there is a problem that productivity is impaired because the user's eye fatigue increases and the time required for the inspection increases. .

In addition, when the eye fatigue of the inspector is increased, the normal inspection is difficult to be performed, and thus there is a problem in that a product of an abnormal state may be produced, resulting in a decrease in production quality.

In addition, when the inspector inspecting the image processing device is changed, the inspection is performed according to subjective judgment criteria for each inspector, so that there is a problem in that the inspection is inconsistent.

The present invention has been made to solve the above problems, an object of the present invention is to capture the image displayed by the image processing device, and to compare the captured image with the pre-stored image of the image processing device The present invention provides an inspection apparatus and an inspection method of an image processing device, which enables inspection of defects and enables more accurate inspections as compared to inspection by a visual inspection of an inspector.

In addition, another object of the present invention is to minimize the defect rate of the image processing device by automating the inspection of the image processing device, it is possible to implement the consistency of the inspection device and inspection method of the image processing device that can improve the production efficiency To provide.

In order to achieve the above object, an inspection apparatus of an image processing device according to the present invention compares a capture unit for capturing an image signal output from an image processing device with the captured image and a previously stored image to determine whether the image processing device is defective. And an error display unit to display whether or not the image processing device is defective according to the determination result.

In addition, the inspection method of the image processing device according to the present invention includes a first step of capturing an image output from the image processing device, and a second step of determining whether the image processing device is defective by comparing the captured image and the pre-stored image; Steps.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a product production line to which the present invention can be applied, and more particularly, a line for producing a device capable of reproducing a moving picture screen such as a VCR and a DVD player (hereinafter referred to as an image processing device).

The production line 100 may be roughly divided into four steps, an assembly process 105, a completion process 110, an inspection process 115, and a shipment process 120. In addition, the work guide providing apparatus 160, 162, 164 which provides a work guide indicating the work contents of the workers at each process step, the inspection system 152, 154, 156 which performs the inspection of the image screen, and the information on each process step are monitored. Monitoring terminal devices 172 and 174 that can be connected to the server 150 for managing and providing a variety of information associated with the production line 100 is connected via a dedicated test line indicated by the solid line in FIG. Meanwhile, since the server 150 is connected to an external network separately from the inspection-only line, it is possible to access information on the production line 100 through the monitoring terminal device 170 from the outside. A test condition editing device 158 for registering or updating the content of a test condition for inspection of an image screen is also connected to the external network, and the test condition editing device 158 may be located on the inspection-only line. .

Looking at each process step of the production line 100 as described above in detail.

The assembly process 105 is a process of assembling the components constituting the VCR or DVD player device. When the assembly of the components is completed, the assembled product is transferred to the completion process 110 using the material balance 180.

In the completion process 110, the completed image processing device is made using the assembled product, and power is connected for the operation of the device. In addition, an image storage medium such as a video tape or a DVD or a video-CD is loaded into the apparatus for examining an image screen. At this time, the image storage medium should be guaranteed integrity.

The inspection process 115 is a process of inspecting whether the image processing apparatus normally extracts data of an image storage medium to provide an image screen, and is a process to which the present invention may be applied.

In the shipment process 120, the device in which no defect is found in the inspection process 115 is packaged and a box label is attached. The device in which the defect is found in the inspection process 115 may be collected and managed separately.

Information about the assembly process 105, the completion process 110, the inspection process 115, the shipment process 120 may be shared through the inspection-only line indicated by the solid line in Figure 2, the information is server Can be stored at 150

3 is an exemplary view showing an inspection system for inspecting the quality of an image screen disposed on the product production line of FIG. 2.

The inspection system includes an image processing device 210 including a conveying device 200 such as a conveyor belt and an output unit 215 for outputting an audio / video signal and a control device 220 for operating the image processing device 210. And a signal divider 230 including an interface unit 235 for receiving an audio / video signal from the output unit 215, and receiving image data from the signal divider 230 and analyzing the data. The defect detection apparatus 240 may perform a quality inspection of an image screen, and the display apparatus 250 may provide the inspection result to an inspector.

Looking at the operation of the inspection system shown in Figure 3 in detail.

When the image processing device 210 is moved by the transport device 200, the image processing device 210 is operated by using the control device 220 to check the quality of the image screen. At this time, the control device 220 may be a wireless remote control device, the inspector directly manipulates the wireless remote control, or pre-set the inspection items in the failure detection device 240, the failure detection device 240 It can also be connected to the wireless remote control device to automatically operate the remote control. The inspection item may be stored in the server 150 illustrated in FIG. 2 and then transferred to the inspection system 152, 154, or 156.

When the image processing device 210 is operated, image data is read from the image storage medium loaded in the previous step, and an audio or video signal is output through the output unit 215. The output signal is collected by the signal distributor 230 through the interface unit 235. Although not shown in FIG. 3, the signal splitter 230 may include two or more interface units 235 to collect audio or video signals from several image processing devices at once.

The signal distributor 230 transmits data about the collected signal to the failure detection device 240. At this time, the data communication may be implemented as a parallel interface or a high speed serial interface such as IEEE1394.

The defect detection apparatus 240 analyzes the collected video data to determine whether the image processing device 210 normally reads the image data.

In addition, the failure detection apparatus 240 provides the inspector with the image screen currently being reproduced and the image screen inspection result through the display device 250 such as a monitor. If two or more image processing devices are being inspected, the display apparatus may provide the inspector with a test result of each image processing device by dividing the screen. In this case, the failure detection device 240 may include the signal splitter 230 or the display device 250.

On the other hand, the result collected by the failure detection device 240 may be stored in the server 150 through the inspection-only line shown in solid line in FIG.

As shown in FIG. 4, an inspection apparatus of an image processing device according to an embodiment of the present invention may include a capture unit 300 for capturing an image output from an image processing device to be inspected, and a capture unit 300. The control unit 400 recognizes the image captured by the image, compares it with the pre-stored image, and determines whether the image processing apparatus is defective, and an error display unit 500 displaying whether an error occurs according to the determination result of the control unit 400. ).

Here, the image processing device plays back a magnetic tape or a DVD to display the image or to display a pre-stored image.

In this case, the stored image is stored in a predetermined memory, and when the inspector inputs a command according to a specific key combination using an operation button formed on an external operation device such as a remote controller or an operation panel installed on the exterior of the image processing device. Extracted from the memory and displayed.

In addition, the capture unit 300 provides a user interface for capturing a part or all of the output image in the image processing device.

Looking at the user interface in more detail with reference to FIG. 5, the operation determination region 310 for determining whether to operate the capture unit 300 and the image captured by an image processing device to be inspected by the user are captured. A capture setting area 320 for setting a region to be set, and an end area 330 for disabling the user interface are included.

That is, the user captures a desired area through the capture area 320 while playing the image through the start button of the capturing unit 300 and stopping the stop button, and stores the captured image. It is done.

In addition, the capture setting area 320 includes Learn Templete for recognizing the area captured by the examiner, Global Templete for recognizing the default capture area, and File Save for storing the captured area.

The controller 400 may include a memory unit 410 in which an image identical to the image captured by the capture unit 300 is stored, and a coordinate storage unit 420 in which coordinate information of an image stored in the memory unit 410 is stored. The comparator 430 extracts an image from the memory unit 410 corresponding to the coordinates of the captured image transmitted from the capture unit 300, and compares the image with the image transmitted from the capture unit 300. Include.

In addition, the comparison unit 430 may include a character reading unit 431 for recognizing characters included in the image captured by the capture unit 300, and a pattern matching unit for recognizing an image pattern of the captured image ( 432).

Meanwhile, the comparison unit 430 extracts coordinate information according to a capture area from the coordinate storage unit 220 and transmits the coordinate information to the comparison unit 430, and the comparison unit 430 is identical to the captured image. The image of the coordinates is extracted from the memory unit 410 to compare and analyze the two images.

Here, the character reading unit 431 performs character recognition by extracting distances between a vector extracted from a pattern of an input character and reference vectors extracted from patterns of previously stored target characters. In addition, an Euclidean distance between the vector of the input pattern and the reference vector is calculated and compared with a predetermined threshold to perform character recognition.

That is, as shown in FIG. 6, the OCR unit 431 recognizes a character included in a predetermined area of the image captured by the capture unit 300 and is included in the image stored in the memory unit 410. Will be compared to a character.

In addition, the user may set the type 710 of the character to be compared and the character 720 to be compared in the captured predetermined area through the user interface provided as shown in FIG. 7.

On the other hand, the pattern matching unit 432 is generally obtained by dividing the observation region of the captured image image into individual pixels, each pixel having a value proportional to the intensity of light of the corresponding portion. Accordingly, the pattern matching unit 432 calculates a matching ratio by comparing pixels between the captured image and the image stored in the memory unit 410.

That is, as shown in FIG. 8A, the predetermined region 810 of the image stored in the memory unit 410 and the predetermined region 820 of the image captured by the capture unit 300 as shown in FIG. 8B. By comparison, the coincidence ratio is calculated.

The error display unit 500 compares and analyzes the image captured by the capture unit 300 and the image stored in the memory unit 410 to display an error message according to the inspector when the match ratio does not match the reference value. do.

In this case, the inspector may control operations of the comparator 400 and the error display unit 500 through a user interface, and check the comparison result by the comparator 400.

As shown in FIG. 9, the user interface includes an image loading region 910 for loading a pre-stored image, an image loaded from the image loading region 910, and an image captured by the capture unit 300. The comparison area 920 to be compared, the coordinate area 930 in which the coordinates of the images to be compared with each other are displayed, and the matching ratio of the comparison result of the comparison unit 430 are displayed, and the matching ratio does not meet the reference value. If not, it includes an error display area 940 for outputting an error message accordingly.

Looking at the inspection method of the image processing device configured as described above are as follows.

In the inspection method of the image processing device according to the exemplary embodiment of the present invention, as shown in FIG. 10, the inspector first sets inspection conditions such as a capture area and an error occurrence condition in the first step (see S1).

Here, in the first step, when the inspection is performed by pattern matching of the image displayed on the image processing device, the capture area and the error occurrence rate may be set, and the character recognition included in the image displayed on the image processing device may be set. When the inspection is made through the setting of the capture area and the check character.

When the setting of the first step is completed, a predetermined image is displayed on the image processing device in a second step. (See S2.)

Here, the image processing device displays a magnetic tape or a DVD, or the inspector displays a pre-stored image through a specific key combination.

In a third step, the capture unit 300 captures the set area (see S3).

In a fourth step, the image captured in the third step is transferred to the control unit 400 (see S4).

In a fifth step, an image stored in the memory unit 410 is extracted to correspond to the area of the captured image transmitted in the fourth step.

In the sixth step, the comparison unit 430 analyzes the image and the captured image extracted in the fifth step.

In the sixth step, when the character of the captured image is recognized and inspected, the character reader 431 recognizes the characters included in the captured image and the extracted image, and compares and analyzes the characters included in the captured image. In the case of the test using the pattern matching unit 432, the pattern matching unit 432 compares and analyzes the pattern matching of each image.

As a seventh step, an error occurrence rate is calculated for a portion that does not match as a result of the comparative analysis of the captured image and the extracted image in the sixth step (see S7).

In an eighth step, the error occurrence rate calculated in the seventh step is compared with a reference value (see S8).

In the ninth step, when the error occurrence rate does not meet the reference value as a result of the comparison in the eighth step, the inspection result such as the error occurrence rate and the error occurrence position is displayed through the error generation unit 500 (see S9). )

Although the present invention has been described in detail above, those skilled in the art to which the present invention pertains may variously modify the present invention without departing from the spirit and scope of the present invention as defined in the appended claims. It is apparent that the present invention may be modified or modified. Therefore, a simple change according to an embodiment of the present invention will not be possible without departing from the technology of the present invention.

According to the present invention of the above configuration, by capturing the image displayed by the image processing device, by recognizing the pattern of the captured image or the characters included in the captured image and comparing it with the pattern or the character of the normal state By inspecting whether the image processing device is defective, there is an effect that the accuracy of the inspection can be improved as compared with the inspection by the naked eye of the inspector.

In addition, it is possible to automate the inspection process of the image processing device to minimize the failure rate, the consistency of the inspection can be implemented has the effect of improving the production efficiency.

1 is a diagram illustrating a configuration of a general image processing apparatus;

2 is a view showing a product production line to which the present invention can be applied;

3 is a diagram showing an inspection system for inspecting the quality of a moving picture screen arranged in the product production line of FIG. 2;

4 is a diagram illustrating an inspection apparatus of an image processing device according to the present invention;

5 is a view illustrating a user interface of a capture unit according to the present invention;

6 is a diagram illustrating a character recognition screen of a captured image according to the present invention;

7 is a diagram illustrating a character recognition setting screen included in a captured image according to the present invention;

8A and 8B are views illustrating an image pattern screen of a captured image according to the present invention;

9 is a diagram illustrating a user interface of a comparison unit and an error display unit according to the present invention;

10 is a diagram illustrating an inspection method of an image processing device according to the present invention.

<Explanation of symbols on main parts of the drawings>

300: capture unit 400: control unit

410: memory unit 420: coordinate storage unit

430: comparison unit 431: OCR unit

432: pattern matching unit 500: error display unit

Claims (11)

A capture unit for capturing an image signal output from the image processing device; A controller for comparing the captured image with previously stored images to determine whether the image processing apparatus is defective; And an error display unit for displaying whether the image processing device is defective according to the determination result. The method of claim 1, And the capture unit captures a part of an image output from the image processing device. The method of claim 2, The capture unit determines an operation of the capture unit; And a user interface including a capture setting area for setting an area to be captured. The method of claim 3, wherein The controller may include a character reader that recognizes a character included in the captured image to determine whether the image processor is defective. The method of claim 3, wherein The control unit includes a pattern matching unit for determining whether the image processing device is defective by recognizing the image pattern of the captured image, the inspection apparatus of the image processing device. The method of claim 1, The controller may include an image loading area for loading a previously stored image; A comparison area for comparing the loaded image with the captured image; A coordinate region in which the coordinates of the compared image are displayed; And a user interface including an error area in which a match ratio is displayed according to the comparison result. A first step of capturing an image output from the image processing device; And a second step of determining whether the image processing device is defective by comparing the captured image with previously stored images. According to claim 7, The first step may include an operation determining area for determining whether to capture or not; A method for inspecting an image processing device, comprising: providing a user interface including a capture setting area for setting an area to be captured. The method of claim 7, wherein The method of claim 2, wherein the image processing device determines whether the image processing device is defective based on whether the previously stored image matches the characters included in the captured image. The method of claim 7, wherein The second step is a method of inspecting an image processing device, characterized in that to determine whether the image processing device is defective by comparing the image pattern of the pre-stored image captured image. The method of claim 7, wherein The second step may include an image loading area for loading previously stored images; A comparison area for comparing the loaded image with the captured image; A coordinate region in which the coordinates of the compared image are displayed; And a user interface including an error area in which a matching ratio is displayed according to the comparison result.