KR101687896B1 - Pattern Generators, System for Testing Performance of Display Equipment Using Test Pattern and Method thereof - Google Patents

Abstract

The present invention relates to a pattern generator for generating a test pattern signal for evaluating the performance of an imaging apparatus, and more particularly, to a pattern generator for testing a resolution of a plurality of straight lines formed in at least one pixel thickness in vertical, horizontal and diagonal directions A curve resolution test part for generating a test pattern signal for testing a resolution of a plurality of curves and circles formed repeatedly; A color reproduction test section for generating a test pattern signal for testing a color reproduction function, and a gray level control section for dividing / displaying luminance levels of 32 levels ranging from black to white, A gray level test section for generating a test pattern signal for testing the test pattern, A simple / overscan test unit for generating a test pattern signal for testing whether or not to correctly express a screen resolution of an input image, a simple / overscan test unit for generating a test pattern signal for red And a color level test section for generating a test pattern signal for testing color levels classified / displayed at 32 levels of luminance with respect to three colors of green, green and blue. .

Description

[0001] The present invention relates to a pattern generator, a pattern generator,

The present invention relates to a pattern generator, and more particularly, to a pattern generator that is designed and arranged so that various items can be simultaneously evaluated during performance evaluation of an image apparatus including a monitor and an encoder supporting UHD (Ultra High Definition) A pattern generator for generating a test pattern signal for implementing a test pattern, and a video apparatus performance evaluation system using the test pattern and a method thereof.

In general, video equipment includes an encoder for processing video signals and a display device (e.g., a monitor) provided in various electronic products such as a portable television, a mobile phone, a camcorder, a navigation device, a notebook computer, a desktop computer,

In the development and production process of the video equipment, a performance evaluation process for checking whether the video equipment normally operates is required. In order to evaluate the performance of the video equipment, a test pattern is used to determine the sharpness , Resolution, and brightness, respectively.

However, the conventional method of evaluating the performance of an image device is inconvenient to separately test various items (e.g., sharpness, resolution, brightness, character representation function, etc.) provided for evaluating the performance of the image device And accordingly, there is a problem that the time and cost for evaluating the performance of the video equipment are wasted.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for generating a test pattern signal for implementing a test pattern, A pattern generator, and a test pattern, and a method thereof.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. .

According to another aspect of the present invention, there is provided a pattern generator for generating a test pattern signal for evaluating performance of an image device, the pattern generator including at least one pixel thick layer having a plurality of straight lines formed in vertical, A curve resolution test section for generating a test pattern signal for testing a resolution of a plurality of curves and circles formed repeatedly; A color reproduction test section for generating a test pattern signal for testing a reproduction function for colors implemented through an image device, and a color reproduction test section for discriminating / displaying luminance of 32 levels from black to white A gray level test that generates a test pattern signal to test gray levels A character test section for generating a test pattern signal for testing an expression function for a character representation, a just / overscan test section for generating a test pattern signal for testing whether or not to correctly express a screen resolution of an input image, And a color level test section for generating a test pattern signal for testing color levels classified / displayed at a luminance of 32 levels for three colors of Red, Green, and Blue And the like.

As an example related to the present invention, the video equipment may include a monitor and an encoder supporting UHD (Ultra High Definition) resolution.

In one embodiment of the present invention, the linear resolution test section includes a first linear resolution test section for generating a test pattern signal for testing resolutions of diagonal lines, vertical lines, and horizontal lines, which are variously implemented in at least one pixel, And a second linear resolution test section for generating a test pattern signal for testing a resolution for a diagonal line, a dot, a vertical line, and a horizontal line implemented in the pixel.

In one embodiment of the present invention, a test pattern signal generated in the first linear resolution testing unit is implemented at each corner of a display screen displayed through the video equipment, and a test generated in the second linear resolution testing unit The pattern signal may be implemented at the center of the display screen displayed through the video equipment.

According to an embodiment of the present invention, in order to test the resolution of the curve according to a test pattern signal generated in the curve resolution test unit,

The curve can be placed on the basis of the equation of FIG.

As an example related to the present invention, the color reproduction test unit may be configured to include a color reproduction test unit for generating a color reproduction test signal including at least one of a white color, a yellow color, a cyan color, a green color, a violet color, a red color, a first color reproduction test section for generating a test pattern signal for testing a reproduction function for a basic color including black, and a color reproduction test section for generating a test pattern signal in 15 color, red, green, and blue colors defined by EBU (European Broadcasting Union) A second color reproduction test section for generating a test pattern signal for testing a blue color reproduction function and a third color reproduction section for generating a test pattern signal for testing a reproduction function of white and black color colors And a test section.

As an example related to the present invention, a test pattern generation signal generated through the first color reproduction test section and the second color reproduction test section includes colors arranged in 8 bits on the left side of the center of each gamut, And on the right side, 10-bit processed colors.

As an example of the present invention, the character test unit may include a first character test unit for generating a test pattern for displaying a black character on a white background, and a test pattern for testing by displaying white characters on a black background And a second character test unit for performing a second character test.

As an example related to the present invention, the gray-

의 수식을 이용해 그레이레벨 값을 설정할 수 있다.

Can be used to set the gray level value.

As an example related to the present invention,

의 수식을 이용해 컬러레벨 값을 설정할 수 있다.

Can be used to set the color level value.

As an example associated with the present invention, the outline may be arranged in units of two pixels to test a 4: 2: 2 ratio of chroma subsampling.

According to another aspect of the present invention, there is provided a system for evaluating performance of an image device, including: a signal input unit receiving a test pattern signal generated from a separate pattern generator; A level value measuring unit for measuring a level value of each area by processing the test pattern signal received through the signal input unit; Level value and a level value measured through the level value measuring unit, and when an abnormality is detected in the specific area, it is determined that an error has occurred in the video equipment related to the specific area, and an error check is requested And a control unit.

According to another aspect of the present invention, there is provided a method of evaluating performance of an image device, the method including receiving a test pattern signal generated from a separate pattern generator, processing the received test pattern signal, A step of extracting a predetermined reference level value for each region of the test pattern signal, and a step of calculating a reference level value based on the extracted reference level value and a level value measured through the level value measuring unit A step of adjusting an image quality of the area and a step of requesting an error check if it is determined that an error has occurred in the video equipment related to the specific area when an abnormality is detected in the specific area after the image quality is adjusted .

The system and method for evaluating an image device using a pattern generator and a test pattern according to the present invention can simultaneously evaluate the performance of various items of image equipment using one test pattern, The time and cost required can be significantly reduced.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

FIG. 1 is a schematic view showing a layout design of an entire test pattern according to an embodiment of the present invention.
FIG. 2 is an exemplary view showing a display screen of a whole test pattern according to an embodiment of the present invention.
FIG. 3 illustrates an arrangement and a design of a first linear resolution test pattern according to an embodiment of the present invention.
FIG. 4 illustrates an arrangement and a design of a second linear resolution test pattern according to an embodiment of the present invention.
FIG. 5 illustrates an arrangement and a design of a curve resolution test pattern according to an embodiment of the present invention.
FIG. 6 shows an arrangement and design of a character test pattern according to an embodiment of the present invention.
FIG. 7 is a block diagram schematically illustrating a configuration of an image equipment performance evaluation system using a test pattern according to an embodiment of the present invention.
FIG. 8 is a flowchart schematically illustrating an image device performance evaluation method using a test pattern according to an embodiment of the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the scope of the technology disclosed herein. Also, the technical terms used herein should be interpreted as being generally understood by those skilled in the art to which the presently disclosed subject matter belongs, unless the context clearly dictates otherwise in this specification, Should not be construed in a broader sense, or interpreted in an oversimplified sense. In addition, when a technical term used in this specification is an erroneous technical term that does not accurately express the concept of the technology disclosed in this specification, it should be understood that technical terms which can be understood by a person skilled in the art are replaced. Also, the general terms used in the present specification should be interpreted in accordance with the predefined or prior context, and should not be construed as being excessively reduced in meaning.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In this specification, the terms "comprising ", or" comprising "and the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps.

Furthermore, terms including ordinals such as first, second, etc. used in this specification can be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals denote like or similar elements, and redundant description thereof will be omitted.

Further, in the description of the technology disclosed in this specification, a detailed description of related arts will be omitted if it is determined that the gist of the technology disclosed in this specification may be obscured. It is to be noted that the attached drawings are only for the purpose of easily understanding the concept of the technology disclosed in the present specification, and should not be construed as limiting the spirit of the technology by the attached drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

FIG. 1 is a schematic diagram illustrating a layout design of an entire test pattern according to an exemplary embodiment of the present invention, and FIG. 2 is an exemplary view illustrating a display screen of an entire test pattern according to an exemplary embodiment of the present invention.

1 and 2, the entire test pattern according to an exemplary embodiment of the present invention is implemented by a test pattern signal generated through a pattern generator. The test pattern includes straight line resolution test patterns 111 and 112, The test pattern 120, the color reproduction test patterns 131, 132, 133 and 134, the gray level test pattern 140, the character test patterns 151 and 152, the just / Patterns 171, 172, and 173, respectively.

The video equipment herein may include monitors and encoders that support UHD (Ultra High Definition) resolution, and the entire test pattern shown in Figures 1 and 2 may include 4: 2: 2 of Chroma Subsampling To test the ratio, you can place the outline in 2 pixel increments.

The entire test pattern shown in FIGS. 1 and 2 is implemented by a test pattern signal generated from a pattern generator. Although the test pattern is basically based on a 16: 9 aspect ratio, it is easily adaptable even in a 17: 9 aspect ratio. It is possible. In addition, the smallest rectangle in FIG. 1 can be implemented so that the length of one side corresponds to 1/18 of the vertical resolution as a basic unit of the pattern area design.

Hereinafter, the entire test pattern shown in FIG. 1 and FIG. 2 will be described separately for each purpose.

First, the linear resolution test patterns 111 and 112 may test a resolution of a straight line having at least one pixel thickness. At this time, the straight lines may be formed in the vertical, horizontal, and diagonal directions.

The test pattern implemented through the linear resolution test pattern can be divided into two detailed patterns. The first linear resolution for testing the resolution for vertical lines, horizontal lines, and diagonal lines that are variously implemented in one pixel or a plurality of pixels A test pattern 111 and a second straight line resolution test pattern 112 for testing the resolving power on diagonal lines, dots, vertical lines and horizontal lines, which are implemented in one pixel.

At this time, the first linear resolution test pattern 111 may be disposed at each corner of the display screen displayed through the video equipment, and the second linear resolution test pattern 112 may be displayed through the video equipment It can be placed in the center of the display screen. The reason why the test patterns are arranged in the above manner is that the sizes of the central part and the outer part are differently applied according to the screen configuration.

The curve resolution test pattern 120 is used for testing the resolution of a plurality of curves or circles that are repeatedly formed, and particularly, it is checked whether or not a moire phenomenon, which may be caused by frequency interference, .

At this time, in the curve resolution test pattern 120, a curve may be arranged by the following equation (1).

는 좌표 (x, y)에서의 휘도(luminance) 레벨이며, 색차 정보는 10 bit 기준의 512로 설정될 수 있다.
here,

Is the luminance level at the coordinates (x, y), and the color difference information can be set to 512 of the 10 bit standard.

The color reproduction test patterns 131, 132, 133, and 134 are used to test a reproduction function for colors implemented through the video equipment. The first color reproduction test pattern 131 and the second color reproduction test pattern 131, (132, 133), and a third color reproduction test pattern (134).

The first color reproduction test pattern 131 may be a white color, a yellow color, a cyan color, a green color, a violet color, a red color, a blue color, a black color, , And 8 basic colors can be arranged at the top of the pattern to confirm the color reproduction. At this time, the 8-bit processed color is arranged on the left side of the center of each gamut, and the 10-bit processed color is arranged on the right side to observe the color difference processed by 8-bit and 10-bit.

The second color reproduction test patterns 132 and 133 are for testing the reproduction function of red, green, and blue colors in addition to 15 colors defined by EBU (European Broadcasting Union) Pattern 5, . ≪ / RTI > In this case, in the case of the second color reproduction test patterns 132 and 133, the colors 132 processed in 8 bits are arranged on the left side with respect to the second straight line resolution test pattern 112, And the color difference between the 8-bit and 10-bit colors can be observed.

In addition, the third color reproduction test pattern 134 is for testing white and black color colors. For example, two 100% white You can place one super-white color between colors.

The gray level test pattern 140 may test gray levels classified / displayed as luminance of 32 levels from 100% black to 100% white, 32 equally spaced gray-level values can be set by calculating 32 pieces of chrominance information using Equation (2).

은 n 번째 32개의 등간격 그레이레벨의 휘도값을 나타난다.
here,

Represents the luminance value of 32 n equally spaced gray levels.

The character test patterns 151 and 152 are for testing the display function for character representation. The character test patterns 151 and 152 include a first character test pattern 151 for displaying a black character on a white background and a white character on a black background And a second character test pattern 152 to be tested. Therefore, the character readability test can be performed through the color contrast of the first character test pattern 151 and the second character test pattern 152. Further, a company name and a logo 180 for indicating the copyright of the pattern design may be further arranged on the left / right side of the center portion.

The just / over scan test pattern 160 may test whether the physical screen resolution of the image input to the image equipment is accurately represented.

For example, in the case of a TV, a picture sent from a broadcasting station or a video device is not displayed as it is, but is slightly enlarged on the screen. This is to avoid displaying the edge of the screen because noise may occur during transmission and reception of video signals. In this case, the overscan is generally generated by about 3% to 5%. In this case, the resolution of the video and the physical resolution of the TV are not perfectly symmetrical, so that the sharpness of the image may be somewhat reduced.

Therefore, it is possible to check the resolution expressed in relation to the size and aspect ratio of the image through the just / overscan test pattern 160, and to test whether the just / overscan test pattern 160 accurately expresses the screen resolution The outermost line of the screen can be displayed in units of two pixels in the order of white-red-green-blue.

The color level test patterns 171, 172, and 173 test color levels classified / displayed at 32 levels of brightness for three colors of red, green, and blue And may be configured in a format basically similar to the gray level test pattern 140. [

That is, the color level test patterns 171, 172, and 173 are patterns for verifying the color difference and the brightness level expressed by the image equipment in a complex manner. Red, green, ) The color information can be expressed by dividing the luminance information into 32 levels while maintaining the color difference information. Equation (3) below summarizes a method for setting the brightness levels of the color level test patterns 171, 172, and 173.

은 n번째 등간격 컬러스케일에서의 휘도값을 나타내고,

은 각 색차의 원래 휘도 값을 나타내며,

은 블랙에 대한 휘도 레벨로 10bit 설정에서는 64이다.
here,

Represents the luminance value at the n-th equally spaced color scale,

Represents the original luminance value of each color difference,

Is the luminance level for black, and is 64 in the 10-bit setting.

FIG. 3 illustrates an arrangement and a design of a first linear resolution test pattern according to an embodiment of the present invention.

As shown in FIG. 3, through the first linear resolution test pattern according to the present invention, it is possible to test resolution of straight lines arranged by arranging straight lines consisting of one or more pixels in vertical, horizontal and diagonal directions. At this time, four first straight line resolution test patterns are formed at corner portions of the display screen, and the resolutions of the respective first straight line resolution test patterns may be different from each other.

Meanwhile, FIG. 4 illustrates an arrangement and a design of a second linear resolution test pattern according to an embodiment of the present invention.

As shown in FIG. 4, the resolution can be tested for straight lines arranged by arranging straight lines composed of one pixel in the vertical, horizontal and diagonal directions through the second linear resolution test pattern according to the present invention. At this time, it is possible to arrange the dots in the center and arrange straight lines around the vertical, horizontal and diagonal "

FIG. 5 illustrates an arrangement and a design of a curve resolution test pattern according to an embodiment of the present invention.

As shown in FIG. 5, it is possible to confirm the resolution of a curve by arranging a repetitive circle pattern in the curve resolution test pattern according to the present invention. That is, it is possible to confirm whether a moire phenomenon occurs when a straight line, a curve, or a circle is repeated by forming a straight line, a curve, or a circle repeatedly with respect to two center points. In this case, V represents the vertical resolution of the image, i.e., the number of horizontal lines. For example, when the resolution of a display device provided through a video equipment is 4096 * 2160, V is 2160. [ Therefore, it is possible to confirm whether or not a moire moire phenomenon occurs through the curve resolution test pattern.

FIG. 6 shows an arrangement and design of a character test pattern according to an embodiment of the present invention.

As shown in FIG. 6, the character test pattern according to the present invention can test the resolution of characters expressed in size, type, font, and the like.

That is, the character test pattern can be tested for character readability by implementing characters in various sizes, types, and fonts. At this time, the characters can be displayed in the horizontal and vertical directions.

FIG. 7 is a block diagram schematically illustrating a configuration of an image device performance evaluation system using a test pattern according to an exemplary embodiment of the present invention. FIG. 8 is a graph illustrating performance of an image device using a test pattern according to an exemplary embodiment of the present invention ≪ / RTI > is a flow chart schematically illustrated to illustrate the method.

7, the video equipment performance evaluation system using a test pattern according to an exemplary embodiment of the present invention includes a signal input unit 710, a storage unit 720, a level value measurement unit 730, a control unit 740 And a display unit 750, as shown in FIG.

Hereinafter, the video equipment performance evaluation method shown in FIG. 8 will be described with reference to the video equipment performance evaluation system shown in FIG.

First, the signal input unit 710 can receive a test pattern signal from a separate pattern generator (S810). The pattern generator may be separately provided outside the video equipment, and the pattern generator may generate a pattern using the test pattern described with reference to FIGS. 1 to 6. FIG.

The level value measuring unit 730 may process the test pattern signal received through the signal input unit and measure a level value for each region [S820].

Then, the control unit 740 extracts a reference level value for each area stored in the storage unit 720, and determines the image quality based on the extracted reference level value and the level value measured through the level value measurement unit Can be adjusted [S830, S840]. The storage unit 720 stores a predetermined reference level value for each region of the test pattern signal. Each region of the test pattern signal includes a straight line resolution test pattern, a curve resolution test pattern, a color reproduction test pattern, A test pattern, a character test pattern, a just / overscan test pattern, a color level test pattern, and the like. Accordingly, the controller 740 may adjust the image quality by comparing the measured level value with the reference level value for each area and changing the set value so that the measured level value matches the reference level value.

However, if an abnormality is detected in the specific area of the test pattern even after the image quality is adjusted, the controller 740 may determine that an error has occurred in the video equipment related to the specific area and request an error check (S850, S860 ]. For example, if it is determined that an error has occurred in the video equipment, the controller 740 may provide an error message to the user through a separate pop-up window.

The display unit 750 may provide a process of adjusting the image quality and requesting an error check according to the control of the controller 750 in real time.

Meanwhile, the method for implementing the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily deduced by a computer programmer in the field.

In addition, the created program is stored in a computer-readable recording medium (information storage medium), and is read and executed by a computer to implement the method of the present invention. And the recording medium includes all types of recording media readable by a computer.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. The present invention is not limited thereto.

710: Signal input unit 720:
730: Level value measuring unit 740:
750:

Claims (15)

A pattern generator for generating a test pattern signal for performance evaluation of an imaging device,
A straight line resolution test unit configured to generate a test pattern signal having at least one pixel thickness to test a resolution of a plurality of straight lines formed in vertical, horizontal, and diagonal directions;
A curve resolution test section for generating a test pattern signal for testing a plurality of curves repeatedly formed and a resolution for a circle;
A color reproduction test unit for generating a test pattern signal for testing a reproduction function for colors implemented through the video equipment;
A gray level test unit for generating a test pattern signal for testing gray levels classified / displayed as luminance of 32 levels from black to white;
A character test unit for generating a test pattern signal for testing an expression function for a character representation;
A simple / overscan test unit for generating a test pattern signal for testing whether or not a screen resolution of an input image is accurately represented; And
A color level test section for generating a test pattern signal for testing color levels classified / displayed at a luminance of 32 levels with respect to three colors of red, green, and blue; , ≪ / RTI >
The straight line resolution test section
In order to test resolution for diagonals, vertical lines and horizontal lines, which are variously implemented in at least one pixel, a 1 pixel horizon / vertical line and a 2 pixel horizon / vertical line in the first column, a 1 pixel diagonal and 2 pixel diagonal in the 2nd column, 3 A test pattern signal in which a pixel horizontal line / vertical line, a 4 pixel horizontal line / vertical line, and a 3-pixel diagonal line and a 4-pixel diagonal line are arranged in a fourth column and outputs the test pattern signal to each corner portion And a first linear resolution test section which implements the first linear resolution test section.
The method according to claim 1,
Wherein the video equipment comprises a monitor and an encoder supporting UHD (Ultra High Definition) resolution.
The method according to claim 1,
The straight line resolution test section
And a second linear resolution test section for generating a test pattern signal for testing a resolution for a diagonal line, a dot, a vertical line, and a horizontal line implemented in one pixel.
The method of claim 3,
Wherein the test pattern signal generated in the second linear resolution testing unit is implemented at a center of a display screen displayed through the video equipment.
The method according to claim 1,
In order to test the resolution of the curve according to the test pattern signal generated by the curve resolution testing unit,

And a curve is arranged on the basis of the formula of the pattern generator.
The method according to claim 1,
The color reproduction test section
Test reproduction of basic colors including white, yellow, cyan, green, violet, red, blue, and black A first color reproduction test section for generating a test pattern signal to be used for the color reproduction;
A second color reproduction test unit for generating a test pattern signal for testing a reproduction function of 15 colors and red, green, and blue colors defined by EBU (European Broadcasting Union) Pattern 5; And
And a third color reproduction test section for generating a test pattern signal for testing a reproduction function of white and black color colors.
The method according to claim 6,
The test pattern generation signal generated through the first color reproduction test section and the second color reproduction test section is
Wherein colors arranged in 8 bits are arranged on the left side of the center of each color gamut, and colors arranged in 10 bits on the right side are arranged.
The method according to claim 1,
The character test unit
A first character test unit for displaying a black character on a white background to generate a test pattern for testing; And
And a second character test unit for generating a test pattern for testing by displaying white characters on a black background.
The method according to claim 1,
The gray level test unit

And sets a gray level value by using the following equation.
The method according to claim 1,
The color level test unit

And the color level value is set by using the following expression.
The method according to claim 1,
Wherein the outline is arranged in units of 2 pixels to test a 4: 2: 2 ratio of chroma subsampling.
A signal input unit for receiving a test pattern signal generated from a separate pattern generator;
A storage unit storing a predetermined reference level value for each region of the test pattern signal;
A level value measuring unit for processing a test pattern signal received through the signal input unit and measuring a level value for each area;
The image quality is adjusted based on a reference level value for each area stored in the storage unit and a level value measured through the level value measurement unit, and when an abnormality is detected for a specific area, And a controller for determining that an error has occurred and requesting an error check,
The separate pattern generator
11. A video equipment performance evaluation system characterized by any one of claims 1 to 11.
13. The method of claim 12,
Further comprising: a display unit for providing a real-time image of a process of adjusting an image quality under the control of the control unit and a process of requesting an error check.
Receiving a test pattern signal generated from a separate pattern generator;
Processing the received test pattern signal to measure a level value for each region;
Extracting a predetermined reference level value for each region of the test pattern signal;
Adjusting image quality of each region based on the extracted reference level value and a level value measured through a level value measuring unit;
And requesting an error check if it is determined that an error has occurred in the video equipment related to the specific area if an abnormality is detected in the specific area after the image quality is adjusted,
The separate pattern generator
11. A method for evaluating performance of an imaging apparatus, comprising the steps of:
15. The method of claim 14,
And adjusting the quality of the image and requesting the error check. The method of claim 1, further comprising the step of:

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