A low-cost method for judging the resolution level of a camera

Abstract

The invention discloses a method for judging a camera resolution level at a low cost. The method comprises the following steps: A, measuring actual resolutions of sample cameras, and grading and classifying the sample cameras; B, measuring gray level contrast values of the sample cameras; C, determining a gray level contrast value interval of the sample cameras of various categories, and establishing a comparison table of the gray level contrast values of the cameras and the corresponding resolution levels of the cameras; and D, measuring the gray level contrast value of a to-be-measured camera, and judging the level of the to-be-measured camera through the comparison table. According to the method disclosed by the invention, the actual resolutions and the gray level contrast values of the sample cameras are measured, the comparison table of the gray level contrast values of the cameras and the corresponding resolution levels of the cameras is established, and the resolution level of the to-be-measured camera can be judged through the comparison table in the case that the gray level contrast value of the to-be-measured camera is measured.

Description

technical field [0001] The invention relates to the field of camera resolution testing. More specifically, the present invention relates to a method for judging the resolution level of a camera at low cost. Background technique [0002] In the current field of camera product manufacturing, especially in the case of mobile phone camera modules, most of them use line-to-resolution graphics cards. After being processed by algorithms on the software, specific values ​​are read out to indicate whether the resolution is good or not or whether it has reached According to the set standard, this kind of line-to-picture card adopts the alternate arrangement of horizontal lines and vertical lines of a single frequency. The so-called single frequency here refers to the distance between horizontal lines and vertical lines and between lines, that is, the line width. All are a certain fixed value. This single frequency has several major defects and deficiencies. The main ones are: firstly...

AI Technical Summary

Problems solved by technology

[0002] In the current field of camera product manufacturing, especially mobile phone camera modules as an example, most of them use line-to-resolution graphics cards. After processing through the algorithm on the software, specific values ​​are read out to indicate whether the resolution is good or not or whether it has reached According to the set standard, this kind of line-to-picture card adopts the alternate arrangement of horizontal lines and vertical lines of a single frequency. The so-called single frequency here refers to the distance between horizontal lines and vertical lines and between lines, that is, the line width. All are a certain fixed value. This single frequency has several major defects and deficiencies. The main reasons are: firstly, it is very lack of versatility, and it is necessary to distinguish various line width graphics cards according to the resolution level of the camera product. The investment cost of making, using and managing the card is very huge; secondly, a single frequency is not conducive to focusing and auto-focusing, which is specifically manifested in the sudden change in the determination of resolution, that is, if the gradual change process of the resolution is described by a curve , the peak of the curve appears too suddenly, and the time for the smaller peak interval is also fleeting, so it is not conducive to focus processing

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