Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method of Image Distortion Correction Based on Lookup Table

An image distortion correction and look-up table technology, which is applied to instruments, calculations, character and pattern recognition, etc., can solve the problems of image quality degradation, misjudgment, errors, etc., and saves the time of correction.

Active Publication Date: 2019-01-08
JIANGSU BRMICO ELECTRONICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of lens generally has a certain degree of optical distortion during the imaging process, which causes some changes in the size and shape of the imaging image, and the quality of the image is reduced, which will bring errors to the subsequent image analysis and image measurement, and even cause misjudgment. , so it is necessary to correct the geometric distortion of the image caused by the camera lens with a large field of view and a short focal length

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] The embodiments of the present invention include:

[0022] An image distortion correction method based on a lookup table, the steps of which include:

[0023] (1) Obtain the distortion map and perform gray scale transformation on the distortion map; then use the threshold method to perform binarization processing, where the pixel gray value of the grid binary image belonging to the grid network is 255, and the remaining pixel gray values It is 0; then, the single pixel of the grid line is refined to obtain a flat grid ima...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for correcting image distortion based on a lookup table. The steps include: generating a lookup table according to reference points selected in a plane grid, and then mapping multi-point pixels to the same position according to the lookup table, and the mapping ratio of each row is It is calculated according to the look-up table, and the image can be corrected while collecting the image. Through the above method, a method for correcting image distortion based on a lookup table in the present invention can satisfy target images with different resolutions, save time for image acquisition and correction, and relax restrictions on image length and width.

Description

Technical field [0001] The invention relates to the field of fingerprint recognition algorithms, and in particular to a method for correcting image distortion based on a lookup table. Background technique [0002] my country has a long history of using fingerprints to identify identities, and as scholars at home and abroad continue to study fingerprint identification systems, fingerprint identification technology is becoming more mature. The main aspects of fingerprint identification research include: fingerprint image preprocessing, fingerprint classification, fingerprint Feature point extraction and fingerprint matching, the most important of which is the image preprocessing stage. At present, in aerospace and aerial photography, medical treatment and various high-precision measuring instruments, in order to obtain more image information about the target scene, a large field of view and short focal length lens are often used. This kind of lens generally has a certain degree of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32
CPCG06V10/242
Inventor 殷丽红佟宝同张飞飞
Owner JIANGSU BRMICO ELECTRONICS