CN100525474C - Computer executable image quality detection system - Google Patents

Abstract

The present invention relates to a computer executable image quality detection system, comprising: a scaling symmetry test unit, which tests the image scaling symmetry characteristics of an image signal; a brightness and chromaticity test unit, which tests the brightness and chromaticity separation characteristics of an image signal; a distortion test unit, which tests the dynamic movement characteristics of an image signal; a color scale test unit, which tests the color purity and clarity characteristics of an image signal; a brightness compensation test unit, which tests the gamma compensation characteristics of an image signal; and a high-low frequency test unit, which tests the high-frequency and low-frequency signal presentation characteristics of an image signal. By executing each test unit simultaneously, the R&D test procedure and time of production personnel can be simplified and shortened.

Description

Computer Executable Image Quality Inspection System

technical field

The invention relates to a computer-executable detection system, in particular to a computer-executable image quality detection system.

Background technique

At present, most instrument manufacturers will provide image quality test patterns (patterns), but the patterns can only test and analyze a single image quality, and the test functions provided are limited. Therefore, in display products (such as LCD TVs or plasma TVs, etc.) etc.) It takes a long time to test during the development and production process.

In the image quality inspection system of the prior art, such as Taiwan Patent Publication No. 554292, this patent discloses a method for detecting a reference position of a resolution test chart, which includes the following steps: using an image capture The device obtains an image containing a maximum dark portion in a resolution test chart; calculates the length of the maximum dark portion in the image; then divides the image into several regions, and wherein the area of each region is the square of half the length of the maximum dark portion; calculates A pixel level average of each area is used to find a darkest area with the lowest pixel level average; and four oblique areas adjacent to the darkest area are found. However, the above method can only test the resolution, but cannot provide other image quality testing functions.

Another example is Taiwan Patent Publication No. I220689, which discloses a detection system and method for a display device, which is used with a display. The display includes a plurality of pixels, and each pixel includes a plurality of sub-pixels. The detection system mainly includes: a graphic generation device for displaying a specific pattern or color on the display; a photoelectric sensing image capture device for capturing the pattern displayed on the display into an image and outputting it; and an image processing system To process the image output by the photoelectric sensing image capture device to identify the abnormal pixels of the display; wherein the graphic generation device can control the display to sequentially generate sequence graphics of pixel subgroups, and the pixel subgroups generate different images at different times. Graphics, each pixel in each pixel subgroup of each graphic at each time only drives a certain pixel bright spot in the pixel, but the above method can only detect whether the pixels in the display are normal and flawless, It cannot provide other image quality test functions.

It can be seen that the above-mentioned existing image quality detection system obviously still has inconveniences and defects in structure and use, and needs to be further improved urgently. In order to solve the problems existing in the image quality inspection system, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above problems. Obviously, it is a problem that relevant industry players are eager to solve. Therefore, how to provide an image quality inspection pattern to effectively simplify and shorten the R&D and testing procedures and time of production personnel, and reduce the risk and cost of display products when they are introduced into mass production has become one of the problems to be solved by researchers. And become the goal that the current industry needs to improve.

In view of the above-mentioned defects existing in the existing image quality detection system, the inventor actively researches and innovates based on the rich practical experience and professional knowledge in the design and manufacture of such products for many years, and cooperates with the application of theories, in order to create a new type of structure The computer-executable image quality inspection system can improve the general existing image quality inspection system and make it more practical. Through continuous research, design, and after repeated trials for samples and improvements, the present invention with real practical value is finally created.

Contents of the invention

The object of the present invention is to overcome the defects existing in the existing image quality inspection system, and provide a computer-executable image quality inspection system with a novel structure. The technical problem to be solved is to provide an image quality test pattern, The test objects produced by various test units are used to test various requirements of image quality, which can effectively simplify and shorten the R&D test procedures and time of production personnel, and thus is more suitable for practical use.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A computer-executable image quality inspection system proposed according to the present invention includes: a scaling symmetry test unit for generating an image scaling symmetry test object, and the image scaling symmetry test object has a four-quadrant coordinate The axis is used to test the image scaling symmetry characteristic of an image signal; a brightness and saturation test unit is to generate a brightness and saturation test object, and the brightness and saturation test object is set on the four-quadrant coordinate axis, It is used to test the separation characteristics of brightness and chroma of the image signal; a distortion test unit generates at least one interlaced distortion test object, and the interlaced distortion test object is set on the four-quadrant coordinate axis for testing the image The dynamic movement characteristic of the signal; a color scale test unit is to generate a color scale test object, and the color scale test object is set on the four-quadrant coordinate axis to test the color purity and distinct characteristics of the image signal; a brightness compensation test unit , is to generate a gamma compensation test object, the gamma compensation test object is set on the four-quadrant coordinate axis for testing the gamma compensation characteristics of the image signal; and a high and low frequency test unit is to generate a high and low frequency Signal test object, the high and low frequency signal test object is set on the four-quadrant coordinate axis to test the high frequency and low frequency signal presentation characteristics of the image signal; wherein the image scaling symmetry test object, the brightness and chroma The test object, the interlaced distortion test object, the color scale test object, the gamma compensation test object and the high and low frequency signal test object are combined with each other to form a test pattern to test the screen coordination of the video signal.

The purpose of the present invention and the solution to its technical problems also adopt the following technical measures to further realize.

In the aforementioned computer-executable image quality inspection system, the interlaced distortion test object can be dynamically moved to any quadrant of the four-quadrant coordinate axes.

In the aforementioned computer-executable image quality inspection system, the interlaced distortion test object dynamically moves to any quadrant of the four-quadrant coordinate axes in a positive rotation manner.

In the aforementioned computer-executable image quality inspection system, the interlaced distortion test object dynamically moves to any quadrant of the four-quadrant coordinate axes in a reverse rotation manner.

In the aforementioned computer-executable image quality detection system, the image scaling symmetry test object has an elliptical portion for detecting whether its leftmost, rightmost, uppermost, and lowermost sides can be completely presented in one within the display area of the screen.

In the aforementioned computer-executable image quality inspection system, the gamma compensation test object further tests the distinct characteristics of each gradation between each color of the image signal.

In the aforementioned computer-executable image quality detection system, there is a scale mark at the end of each axis of the four-quadrant coordinate axes to provide a reference basis for correcting the image.

In the aforementioned computer-executable image quality inspection system, the high and low frequency signal test object has a plurality of rectangular blocks, each of which has a plurality of lines arranged in parallel and with different thicknesses to correspond to the high and low frequency signal to be tested. The frequency and the low frequency signal exhibit characteristics.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. It can be seen from the above technical solutions that in order to achieve the above object, the present invention provides a computer-executable image quality inspection system, which includes: a scaling symmetry test unit, which generates an image scaling symmetry test object, and the test object has four The quadrant axis is used to test the image scaling symmetry characteristics of the image signal. There are scale marks at the ends of each axis of the four-quadrant axis to provide references for testers to perform calibration and adjustment operations, and the image scaling is symmetrical The performance test object has an oval part, which is used to detect whether the leftmost, rightmost, uppermost and lowermost sides can be completely presented in the display area of a screen; the brightness test unit is to generate brightness and Saturation test object, the test object is set on the four-quadrant coordinate axis to test the separation characteristics of the brightness and chroma of the image signal; the distortion test unit is a test object for generating interlaced distortion, the test object is set in the four-quadrant On the coordinate axis, it is used to test the dynamic movement characteristics of the image signal, wherein the interlaced distortion test object dynamically moves to any quadrant of the four-quadrant coordinate axis in a forward rotation or reverse rotation; the color scale test unit is to generate The color scale test object, which is set on the four-quadrant coordinate axis, is used to test the color purity and distinct characteristics of the image signal; the brightness compensation test unit is to generate the gamma compensation test object, and the test object is set on the four-quadrant coordinate On the axis, it is used to test the gamma compensation characteristics of the image signal; and the high and low frequency test unit is a test object that generates high and low frequency signals. The test object is set on the four-quadrant axis to test the high frequency and low frequency of the image signal Signal presentation characteristics, wherein the high and low frequency signal test object has a plurality of rectangular blocks, each rectangular block has a plurality of lines arranged in parallel, and the lines between each rectangular block have differences in thickness.

By virtue of the above technical solutions, the computer-executable image quality detection system of the present invention has at least the following advantages: With this computer-executable image quality detection system, various test objects (for example, image scaling symmetry test objects, bright chroma and chroma test objects, interlaced distortion test objects, color scale test objects, gamma compensation test objects and high and low frequency signal test objects) to test the image quality of display products to detect the brightness, chroma, and dynamics of image quality Display features such as movement, color scale, brightness compensation, and signal presentation can simplify and shorten the development and testing procedures and time of production personnel, and each test object is combined into a test pattern to test the coordination of the image screen.

In summary, the computer-executable image quality detection system with special structure of the present invention includes: a zoom symmetry test unit for testing the image zoom symmetry characteristics of an image signal; a brightness test unit for testing the brightness and Separation characteristics of chroma; distortion test unit, which tests the dynamic movement characteristics of video signals; color scale test unit, which tests the color purity and distinct characteristics of video signals; brightness compensation test unit, which tests gamma compensation characteristics of video signals; and high and low frequency tests Units are used to test the presentation characteristics of high-frequency and low-frequency signals of image signals. By executing each test unit at the same time, it is possible to simplify and shorten the development and testing procedures and time of production personnel. Therefore, by providing an image quality test pattern, the present invention can effectively simplify and shorten the R&D test procedure and time of production personnel by testing various requirements of image quality through test objects generated by various test units. It has the above-mentioned many advantages and practical value, both in the structure and function of the product are greatly improved, the technology has made great progress, and it has a number of enhanced functions compared with the existing image quality detection system, so it is more suitable for Practical, sincerity is a novel, progressive and practical new design.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a system block diagram of a preferred embodiment of the present invention.

Fig. 2 is a schematic diagram of a combination of detection objects in a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of an image scaling symmetry test object according to a preferred embodiment of the present invention.

FIG. 4A is a schematic diagram of a lightness and chroma test object according to a preferred embodiment of the present invention.

FIG. 4B is a schematic diagram when the separation property of the lightness and chroma test object in FIG. 4A is not good.

FIG. 5 is a schematic diagram of an interleaving distortion test object according to a preferred embodiment of the present invention.

FIG. 6 is a partially enlarged schematic diagram of the interlacing distortion test object of FIG. 5 .

FIG. 7A is a schematic diagram of a high and low frequency signal test object according to a preferred embodiment of the present invention.

FIG. 7B is a schematic diagram of the high and low frequency signal test object in FIG. 7A when the signal is not good.

10: Zoom symmetry test unit 11: Image zoom symmetry test object

11a: Four-quadrant coordinate axis 11b: Oval part

11c: Scale marking 20: Brightness test unit

21: Brightness and chroma test object 30: Distortion test unit

31: Interlaced distortion test object 31a: Pattern junction

31b: Sawtooth 40: Color scale test unit

41: Color scale test object 50: Brightness compensation test unit

51: Gamma compensation test object 60: High and low frequency test unit

61: High and low frequency signal test object 61a: Line

100: Image quality inspection system

Detailed ways

In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, Features and their functions are described in detail below.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a system block diagram of a preferred embodiment of the present invention, and FIG. 2 is a schematic diagram of a combination of detection objects in a preferred embodiment of the present invention. The computer-executable image quality detection system 100 of the preferred embodiment of the present invention includes: a scaling symmetry testing unit 10, a brightness testing unit 20, a distortion testing unit 30, a color scale testing unit 40, and a brightness compensation testing unit 50 And high and low frequency test unit 60, wherein:

The scaling symmetry testing unit 10 produces an image scaling symmetry test object 11, and the image scaling symmetry testing object 11 has a four-quadrant coordinate axis 11a and an ellipse 11b (as shown in FIG. 3 ), when the corresponding image When the image graphics of the signal are displayed on the screen, the elliptical part 11b is used to detect whether the leftmost, rightmost, uppermost and lowermost sides can be completely presented in the display area of the screen (not shown in the figure), There is a scale mark 11c at the end of each axis of the four-quadrant coordinate axis 11a. When the test screen ratio is 4:3 and converted to a screen ratio of 16:9, it is used as a reference for testers to perform calibration and adjustment operations to confirm Whether the image scaling is normal and meets the specified quality.

The luminance and chroma test unit 20 produces luminance and chroma test objects 21, and the luminance and chroma test objects 21 are arranged on the four-quadrant coordinate axis 11a and are located in the gamma compensation test Between the object 51 and the high and low frequency signal test object 61, a plurality of white blocks and a plurality of color blocks from light to dark are combined to test image signals (for example, composite signal CVBS) (as shown in FIG. 4A ), the separation characteristics of the brightness and chroma of the image graphics, when the separation characteristics are not good, the picture presented by the image graphics will appear iridescent, or the separated image signal will appear to be transmitted out of sync ( as shown in Figure 4B).

The distortion (deinterlace) test unit 30 is to generate the interlaced distortion test object 31, and the interlaced distortion test object 31 is arranged on the four-quadrant coordinate axis 11a, adjacent to the high and low frequency signal test object 61, in order to test the image graphics in dynamic When moving, whether it has the phenomenon of graphic distortion, when the dynamic image processing is not good, then the interlaced distortion test object 31 will appear jagged 31b phenomenon (as shown in Figure 6 ) at its pattern junction 31a, wherein the interlaced distortion test object 31 Positive rotation, reverse rotation or parallel movement in other directions such as left, right, up, down, left up, left down, right up or right down within the four-quadrant coordinate range (that is, any quadrant), The shape design of its pattern junction 31a is mainly convenient for testers to observe whether there is a phenomenon of graphic distortion, and Fig. 5 is a schematic diagram of the movement of the interlaced distortion test object 31. In addition, two interlaced distortion test objects 31 are used as examples in Fig. 2. Those skilled in the relevant technical fields can change the number of objects so as to reduce or increase them.

The color bar test unit 40 produces a color bar test object 41, and the color bar test object 41 is arranged on the four-quadrant coordinate axis 11a, adjacent to the high and low frequency signal test object 61 (as shown in Figure 2 ), which has color blocks arranged from light to dark in different color levels, and is used to test whether the color purity of each color is distinct, whether the colors are mixed together or whether the color purity is wrong.

The brightness compensation test unit 50 produces a gamma compensation test object 51, and the gamma compensation test object 51 is arranged on the four-quadrant coordinate axis 11a, adjacent to the brightness and chroma test object 21 (as shown in FIG. 2 ), color blocks with different color levels are used to test the gamma compensation characteristics of the video signal, or whether the levels of each color are distinct, wherein the gamma compensation test object 51 is similar to the color level test object 41, However, it has darker color blocks, and the arrangement position and image graphics of the two can be interchanged.

The high and low frequency test unit 60 generates a high and low frequency signal test object 61, and the high and low frequency signal test object 61 is arranged on the four-quadrant coordinate axis 11a, between the brightness and chroma test object 21 and the color scale test object 41 ( As shown in Figure 2), there are a plurality of rectangular blocks, each of which has a plurality of lines 61a arranged in parallel, and the lines 61a between each of the rectangular blocks have differences in thickness (as shown in Figure 7A ), used to test the presentation characteristics of the high-frequency signal and low-frequency signal of the image signal, as shown in Fig. , the arrangement of the lines 61a in the rectangular block is messy and misplaced.

The present invention uses this computer-executable image quality inspection system to test objects generated by various test units (for example, image scaling symmetry test objects, brightness and chroma test objects, interlaced distortion test objects, and color scale test objects. object, gamma compensation test object and high and low frequency signal test object) to test the image quality of display products to detect the display characteristics of image quality such as brightness, chroma, dynamic movement, color scale, brightness compensation and signal presentation, etc. In order to simplify and shorten the R & D test procedures and time of production personnel, and each test object is combined into a test pattern, and the coordination of the image screen can be tested.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solution of the present invention.

Claims (8)

1. A computer-executable image quality detection system, characterized in that it includes: a scaled symmetry test unit,

generating an image zoom symmetry test object, the image zoom symmetry test object has a four-quadrant coordinate axis for testing the image zoom symmetry characteristic of an image signal; A bright chroma test unit,

generating a brightness and chroma test object, the brightness and chroma test object is set on the four-quadrant coordinate axis for testing the separation characteristics of the luminance and chroma of the image signal; A distortion test unit,

generating at least one interlaced distortion test object, the interlaced distortion test object is arranged on the four-quadrant coordinate axis, and is used for testing the dynamic movement characteristics of the image signal; A color scale test unit,

generating a color scale test object, the color scale test object is set on the four-quadrant coordinate axis for testing the color purity and distinct characteristics of the image signal; A brightness compensation test unit is used to generate a gamma compensation test object, the gamma compensation test object is set on the four-quadrant coordinate axis, and is used to test the gamma compensation characteristic of the image signal; and A high and low frequency test unit,

generating a high and low frequency signal test object, the high and low frequency signal test object is set on the four-quadrant coordinate axis for testing the high frequency and low frequency signal presentation characteristics of the image signal; Wherein the image scaling symmetry test object, the brightness and chroma test object, the interlacing distortion test object, the color scale test object, the gamma compensation test object and the high and low frequency signal test object

Combined with each other to form a detection pattern, so as to test the screen coordination of the image signal. 2. The computer-executable image quality inspection system according to claim 1, wherein the interlaced distortion test object can be dynamically moved to any quadrant of the four-quadrant coordinate axes. 3. The computer-executable image quality inspection system according to claim 2, wherein the interlaced distortion test object dynamically moves to any quadrant of the four-quadrant coordinate axis in a positive rotation manner. 4. The computer-executable image quality inspection system according to claim 2, wherein the interlaced distortion test object dynamically moves to any quadrant of the four-quadrant coordinate axis in a reverse rotation manner. 5. The computer-executable image quality inspection system according to claim 1, wherein the image scaling symmetry test object has an elliptical portion for detecting the leftmost, rightmost, and uppermost Whether the side and the bottom side can be completely presented in the display area of a screen. 6. The computer-executable image quality inspection system according to claim 1, wherein said gamma compensation test object further tests the distinct characteristics of each gradation between each color of the image signal. 7. The computer-executable image quality inspection system according to claim 1, wherein there is a scale mark at the end of each axis of the four-quadrant coordinate axes to provide a reference for correcting the image. 8. The computer-executable image quality inspection system according to claim 1, wherein said high and low frequency signal test object has a plurality of rectangular blocks, and each rectangular block has a plurality of strips arranged in parallel and Lines with different thicknesses are used to test the characteristics of the high-frequency and low-frequency signals correspondingly.

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