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Contour data feature point detection method and device

A feature point detection and contour data technology, applied in the field of 3D visual images, can solve the problems of low detection efficiency and low accuracy, and achieve the effect of improving detection efficiency and reducing the detection of interference features.

Pending Publication Date: 2021-11-16
BEIJING LUSTER LIGHTTECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technology has low detection efficiency and low accuracy in the process of contour image features

Method used

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  • Contour data feature point detection method and device
  • Contour data feature point detection method and device
  • Contour data feature point detection method and device

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. In the description of this application, unless otherwise specified, " / " means or means, for example, A / B can mean A or B; "and / or" in this application is only a description of the relationship between associated objects , which means that there can be three kinds of relationships, for example, A and / or B, can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the present application, "plurality" means two or more.

[0026] The embodiment of the present application shows a method for detecting feature points of contour data, which can be divided into five parts: contour extraction, filtering processing, peak point acquisition, edge point acquisition, and contour data feature acquisition. figure 1 It is a schematic flowchart of a method fo...

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Abstract

The invention discloses a contour data feature point detection method and device, and the method comprises the steps: traversing all contour data feature points, and obtaining the peak point coordinates of the contour data feature points; searching contour data feature points on the left and right sides of the peak point as candidate edge points according to a preset search range by taking the peak point as a center, wherein if the gradient of the contour data feature points is smaller than a preset gradient low threshold value or larger than a preset gradient high threshold value, the contour data feature points are candidate edge points; and screening the candidate edge points as target edge points according to a preset expected width, and determining contour image features according to the peak points and the edge points. According to the technical scheme, it can be avoided that the whole image is traversed to obtain edge points, and the efficiency and accuracy of contour data feature point detection are improved.

Description

technical field [0001] The invention belongs to the field of 3D visual images, and in particular relates to a method and device for detecting feature points of contour data. Background technique [0002] In the field of 3D image vision, the depth image is a three-dimensional image, and the coordinates of each pixel in the depth image are (x, y, z); the depth image is split into multiple two-dimensional images characterized by (x, z), Therefore, an approximate depth image can be synthesized by stitching multiple 2D images. By detecting the feature information of the two-dimensional image, the feature information in the depth image can be obtained to reduce the difficulty of measurement on point cloud data and improve its measurement accuracy, such as the measurement of target features and defect detection. [0003] Existing contour image detection methods usually obtain peak points by traversing the entire contour image, and then calculate contour image data using correspond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00G06T7/13
CPCG06T7/0002G06T7/13G06T2207/10028G06T5/70
Inventor 冯开勇姚毅杨艺全煜鸣金刚彭斌
Owner BEIJING LUSTER LIGHTTECH
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