Sub-pixel-level distortion correction method and apparatus

A distortion correction, sub-pixel technology, applied in the field of image processing, can solve problems such as distortion correction of products that cannot be projected, affecting measurement accuracy, affecting matching quality, etc., to improve the calibration effect, reduce optical costs, and reduce projection distortion. Effect

Active Publication Date: 2017-05-24
大连鉴影光学科技有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The influence of this error is not obvious on ordinary video and projection, but it has a greater impact on more precise applications or ultra-short focal lengths with relatively large distortion.
[0004] For example, in the field of binocular stereo vision, the distortion of the two cameras is required to be completely corrected to match the image. Pixel-level distortion will directly reduce the matching accuracy and affect the matching quality.
In the field of high-precision visual dimension detection, distortion will directly cause measurement errors and affect measurement accuracy
[0005] In addition, the algorithm cannot correct the distortion of projection products

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sub-pixel-level distortion correction method and apparatus
  • Sub-pixel-level distortion correction method and apparatus
  • Sub-pixel-level distortion correction method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0023] In this embodiment, the distortion correction of camera 1+lens 2 is taken as an example, and the main technical solutions adopted are:

[0024] Please refer to figure 1 with figure 2 , the industrial computer 3 needs to be connected to the camera and the display 4, the display 4 is placed in front of the camera lens 2, the display surface is facing the lens, and the dista...

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 sub-pixel-level distortion correction method and apparatus. According to the method and the apparatus, display points on a display (4) are controlled to be turned on from a known point by adopting an industrial personal computer, and a camera (1) is controlled to perform image extraction and processing. By adopting the method and the apparatus, the distortion calibration precision can be effectively improved, the sub-pixel-level distortion correction effect can be achieved, the edge calibration effect can be greatly improved, and a visual product can be applied to a more accurate occasion. By applying the method and the apparatus to a projection device, the projection distortion can be remarkably reduced, the projection effect can be improved, and the optical cost can be reduced. An algorithm is simple, and the image processing speed is not influenced, so that the method and the apparatus are very suitable for the fields of high-precision machine vision, camera imaging distortion correction, projection distortion correction and the like.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a sub-pixel level distortion correction method and device Background technique [0002] Imaging equipment on the market, such as cameras, cameras, etc., and imaging products that use lens groups will inevitably produce some distortion, especially in the case of large field of view and short focal length. The effect of distortion is more obvious. Both lens optimization and image algorithms can achieve better distortion correction. Since lens optimization has limited effect at short focus, and involves high technical difficulty and high cost, image algorithm correction is usually used. [0003] At present, the commonly used correction algorithm in the world is Zhang Zhengyou’s calibration method, that is, through the standard black and white checkerboard image, the image position of each corner point is calculated, and compared with the theoretical image position, ...

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 Applications(China)
IPC IPC(8): G06T5/00G06T7/80
CPCG06T2207/10004G06T5/80
Inventor 郭右利付瑶
Owner 大连鉴影光学科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap