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Sub-pixel level visual feature point positioning method and device based on step response matching

A sub-pixel-level, visual feature technology used in the field of electronic information to improve accuracy and achieve step response matching

Pending Publication Date: 2020-07-17
北京神工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a sub-pixel-level visual feature point positioning method and device based on step response matching, the purpose of which is to solve the problem of how to realize sub-pixel level positioning to improve the positioning accuracy

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  • Sub-pixel level visual feature point positioning method and device based on step response matching
  • Sub-pixel level visual feature point positioning method and device based on step response matching
  • Sub-pixel level visual feature point positioning method and device based on step response matching

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0040] The technical solutions described in the embodiments of this application can be applied to figure 1 In the scenario shown: figure 1 In , a preset marking line A is set on the object to be positioned, and the gray values ​​of the areas on both sides of the marking line are uniform and different. Assume that the gray value of the region on the side with a higher gray value is H1, and the gray value of the region on the side with a lower gray value is H0.

[0041] The position...

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PUM

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Abstract

The invention discloses a sub-pixel level visual feature point positioning method and device based on step response matching. The method includes: acquiring an image of a to-be-positioned object provided with a marking line, wherein the gray value of one side of the marking line is greater than the gray value of the other side of the marking line; obtaining a correction item of the to-be-positioned object, determining the correction item according to the coordinate values of the sub-pixel points determined by the neighborhood of the marking line in the image, and correcting the position information of the to-be-positioned image by using the correction item to obtain a positioning result. Visibly, by setting the marking line on the object to be positioned and setting different gray values on the two sides of the marking line, step response matching of the sub-pixel points is achieved, and therefore the precision of the positioning result is improved.

Description

technical field [0001] The present application relates to the field of electronic information, in particular to a method and device for locating sub-pixel-level visual feature points based on step response matching. Background technique [0002] The essence of the realization of general industrial visual positioning technology is to recognize the step signal corresponding to some feature "point" or "line" in the image. The traditional recognition principle of "point" or "line" in the image is based on the judgment of the gray value of the pixel. The processing object is a pixel point, and the resolution scale corresponding to the pixel must be used as the step value. Therefore, it is difficult to achieve sub-pixel level positioning accuracy. In addition, due to the low-pass effect of discrete pixels in the camera imaging process, the position information of many step signal points is lost, which is not conducive to the realization of high-precision visual positioning. [...

Claims

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Application Information

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IPC IPC(8): G06K9/32
CPCG06V10/245G06V10/242
Inventor 朱炫霖张洁茹范家怿叶玉玲邓辰
Owner 北京神工科技有限公司