Resolution power test method and system based on ISO12233

An ISO12233, testing method technology, applied in the field of resolution testing methods and systems based on ISO12233, can solve problems such as large differences in subjective evaluations, poor repeatability of test results, unsuitable for batch processing, etc., to achieve the effect of fast resolution

Inactive Publication Date: 2018-06-15
QINGYAN NEW ENERGY VEHICLE ENG CENT (XIANGYANG) CO LTD
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Problems solved by technology

[0003] At present, the ISO proposes that the resolution test chart is widely used in the industry, but the test results of the recommended software (HYRes) are poor in repeatability, and it does not support the evaluation of the resolution in Raw format. Therefore, visual images are often used in the industry to judge the results, resulting in subjective evaluation. The difference is large, and it is impossible to export batch results of images, etc.
[0004] In addition, due to the characteristics of the image sensor (Image Sensor), the industry uses a difference algorithm to correct the original Raw format image during the resolution test. Due to the variety of interpolation algorithms, the users of the camera module use different image signal processors. (ISP) produces differentiated results
[0005] In summary, the traditional resolution test method has the problems of inconsistent judgment standards, poor repeatability, and not suitable for batch processing

Method used

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  • Resolution power test method and system based on ISO12233
  • Resolution power test method and system based on ISO12233
  • Resolution power test method and system based on ISO12233

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] figure 1 A flow chart of a resolution test method provided as an example of the present invention. Such as figure 1 As shown, the method includes:

[0029] 1) Obtain the Raw format sample image of the ISO12233 test pattern;

[0030] 2) Select or input the test block coordinates from the Raw format sample image, determine the test block 100, extract the two-dimensional image data within the coordinate range, as the image data in the test block;

[0031] figure 2 A schematic diagram of selecting a test block of a resolution test method provided for an example of the present invention, by reading the starting position and the end position of the selected picture test block, ...

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Abstract

The invention discloses a resolution power test method and system based on ISO12233. The test method comprises the steps of obtaining Raw format sample images of ISO12233 test images; selecting or inputting test block coordinates from the Raw format sample images, determining test blocks, and extracting two-dimensional image data in a coordinate range as image data in the test blocks; carrying outseparation recombination on image data channels in the test blocks and carrying out slicing sampling on the recombined image data channels; and calculating and judging whether all sample slices passor not. According to the method and the system, the rapid and batch test can be carried out on resolution power of camera modules.

Description

technical field [0001] The invention relates to the technical field of resolution testing, in particular to a resolution testing method and system based on ISO12233. Background technique [0002] Resolution is used to describe the ability of the camera module to distinguish and restore the object being photographed, and is an important indicator of image evaluation. With the continuous development of science and technology, the resolution of camera modules is getting higher and higher. It is necessary to test the resolution of camera modules to select different levels of camera modules to ensure their quality. [0003] At present, the ISO proposes that the resolution test chart is widely used in the industry, but the test results of the recommended software (HYRes) are poor in repeatability, and it does not support the evaluation of the resolution in Raw format. Therefore, visual images are often used in the industry to judge the results, resulting in subjective evaluation. ...

Claims

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Application Information

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IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 宗鹏杨超张晓军朱会娟
Owner QINGYAN NEW ENERGY VEHICLE ENG CENT (XIANGYANG) CO LTD
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