Positioning method, terminal and storage medium of test chart card

A positioning method and technology for testing images, which can be used in testing optical performance, image enhancement, image analysis, etc., can solve problems such as low success rate of positioning and recognition, and improve the accuracy.

Active Publication Date: 2022-06-21
GEER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a positioning method, terminal and computer-readable storage medium of a test chart, aiming to solve the problem of low success rate of positioning and identification using the Cartesian coordinate system in the existing short-focus lens testing process

Method used

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  • Positioning method, terminal and storage medium of test chart card
  • Positioning method, terminal and storage medium of test chart card
  • Positioning method, terminal and storage medium of test chart card

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Embodiment Construction

[0074] It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0075] Please refer to figure 1 , figure 1 It is a schematic diagram of a hardware structure of a terminal provided in various embodiments of the present invention. The terminal includes components such as a communication module 01 , a memory 02 and a processor 03 . Those skilled in the art can understand that, figure 1 The terminals shown in may also include more or fewer components than shown, or some combination of components, or a different arrangement of components. The processor 03 is respectively connected to the memory 02 and the communication module 01 , the memory 02 stores a computer program, and the computer program is simultaneously executed by the processor 03 .

[0076] The communication module 01 can be connected with external devices through the network. The communication module 01 can rece...

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PUM

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Abstract

The invention discloses a positioning method, a terminal and a storage medium for a test chart card. The method comprises: using a lens module on a test tool to take pictures of the test chart card to obtain a test image; performing binarization processing on the test image, Obtain a binarized test image; according to the Cartesian coordinates and gray values ​​of each pixel in the preset center candidate area in the binarized test image, obtain the vertex of the center test chart in the binarized test image; The polar coordinates and gray value of each pixel in the preset non-center candidate area in the binarized test image are obtained to obtain the vertices of the non-center test card in the binarized test image. The invention solves the problem of low success rate of positioning and identification using the Cartesian coordinate system in the existing short-focus lens testing process.

Description

technical field [0001] The present invention relates to the technical field of lens optical testing, and in particular, to a positioning method for a test chart, a terminal and a computer-readable storage medium. Background technique [0002] In the lens testing process, there are often chart tests, such as the chart used for the lens resolution SFR test, the color saturation test chart, and the lens distortion test chart. Before testing, the charts need to be identified and positioned. [0003] The Cartesian coordinate system is used for positioning and identification in the existing image card identification and positioning process. During the test of the medium and telephoto lens, because the distortion of the medium and telephoto lens is relatively small, the Cartesian coordinate system can be used to successfully locate and identify, but for the short-focus lens, especially the ultra-wide-angle fisheye lens, there will be serious distortion. At this time, the Cartesia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02G06T7/70G06T7/00G06V10/28G06T7/13G06T7/62G06T7/66G06T7/90G06T5/00
CPCG01M11/0242G06T7/70G06T7/0002G06T7/13G06T7/62G06T7/66G06T7/90G06T5/002G06T2207/10004G06V10/28
Inventor 马文芹
Owner GEER TECH CO LTD
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