Picture for testing shooting die set and method thereof

A camera module and picture technology, applied in image communication, television, electrical components, etc., can solve the problem of inaccurate overall image quality evaluation, achieve the effect of accurately evaluating the overall image quality, large quantity, and improving evaluation accuracy

Active Publication Date: 2015-07-29
NANCHANG VIRTUAL REALITY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] but figure 1 In the chart in , if the sampling box is selected in the center of the image, the sampling box will be all white, and this sampling box cannot be used for sampling judgment, so it is easy to cause inaccurate evaluation of the overall image quality

Method used

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  • Picture for testing shooting die set and method thereof
  • Picture for testing shooting die set and method thereof
  • Picture for testing shooting die set and method thereof

Examples

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Embodiment Construction

[0029] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0030] The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same...

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Abstract

The invention provides a picture for testing shooting die set. The picture is quadrate and comprises a white squares which have the same size and are distributed at intervals; one white square is positioned in the center of the picture, and other white squares are uniformly arranged around the center of the picture; each white square is surrounded with a black area. According to the picture, the shooting die set is used for shooting the image to obtain an image; a plurality of selecting square frames are selected for the image; two ends of each sampling square frame are positioned in the black area, and the middle is positioned in the white square, so that the plurality of sampling square frames are the black-white-black graphics; the MTF value of pixel points in the sampling square frames can be calculated according to the black-white-black graphics; if the MTF value is close to 1, the performance of the tested shooting die set is high; the central area of the picture can be selected through the sampling square frame; the selected sampling square frames are not purely white and can be used for sampling determining, so that the evaluation accuracy of the whole image quality can be improved. The invention further provides a method for testing the shooting die set.

Description

technical field [0001] The invention relates to the technical field of testing camera modules, in particular to a picture for testing camera modules and a method thereof. Background technique [0002] When testing the camera module (Compact Camera Module, CCM), it is generally carried out in the light box. A test chart is pasted on the top of the light box, and the CCM is placed in the jig on the desktop at the bottom of the light box. The desktop and the chart are required To maintain parallelism, the image acquisition device of the CCM captures charts in a specific bright environment, and transmits the collected image data to the test software. The test software analyzes the collected image information, processes it through a specific algorithm, and judges whether the resolution of the CCM is good or not. Since the resolution is different in different positions where the CCM shoots the image, it is usually necessary to select different areas (such as the center and four si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
Inventor 江传东喻圣博
Owner NANCHANG VIRTUAL REALITY RES INST CO LTD
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