Method and system for capturing content of test chart

Abstract

The invention relates to the technical field of compact camera module detection and provides a method and system for capturing the content of a test chart. The method comprises the steps of calculating the coordinates of a central point C of the test chart according to the center coordinates of four positioning crosses on the test chart, calculating the coordinates of the central point of four virtual crosses of each view field, calculating the coordinates of all view field capturing points, and drawing corresponding small image boxes in the image of the test chart according to the coordinates of each view field capturing point and the corner demands of the small image box. According to the method, errors can not be generated due to the rotation of the image of the test chart, and capturing precision is improved; meanwhile, when the image of the test chart is shot through a compact cameral module, position-capturing of test chart content capturing points of each view filed can be achieved automatically simply by adjusting the four positioning crosses of the test chart to be within a corresponding blue box of the compact camera module, operation is convenient and quick, and testing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of camera module detection, and in particular relates to a method and system for grabbing test chart content. 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 attached to 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 table is required to be parallel to the chart. , There is a CCM image acquisition device in the fixture, and the collected image data is transmitted to the computer next to it with a data cable. The test software on the computer analyzes the collected images, processes them through a specific algorithm, and judges whether the resolution of the CCM is good or not. [0003] Since the resolution is different in different positions (such as the center and the periphery) of the image captured by the CCM, the resolution of a CCM cannot ...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a method and system for grabbing test chart content, aiming to solve the problem that the grabbing algorithm for test chart content in the prior art cannot solve the grab error caused by the rotation of the test screen, and further needs testers Continuously moving the desktop fixture, time-consuming and labor-intensive, low test efficiency

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