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Description method of image characteristic points

A technology of image feature points and pixel points, which is applied in the field of video processing to ensure the effect of rotation invariance

Active Publication Date: 2018-11-06
深圳市兴海物联科技有限公司
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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 provide a method for describing image feature points, which aims to solve the problem that the existing video characterization method only uses part of the information of the video to perform one-sided characterization of the video

Method used

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  • Description method of image characteristic points

Examples

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no. 1 example

[0026] figure 1 The basic flow chart of the method for describing the spatiotemporal feature points of video images provided in this embodiment, the method includes:

[0027] S101. Determine the main direction of the video image according to the spatio-temporal feature points on the integrated video.

[0028] The specific steps of this S101 are: constructing a cylindrical area centered on the spatio-temporal feature points on the integrated video of the video image, and performing wavelet calculation on the integrated video in the preset area of ​​the cylindrical area, to obtain each preset area of ​​the integrated video in the cylindrical area. Set the wavelet calculation value of the area, compare the wavelet calculation value of each preset area, and determine the direction corresponding to the preset area with the largest wavelet calculation value as the main direction θ of the spatiotemporal feature point.

[0029] It should be understood that the aforementioned cylindri...

no. 2 example

[0063] This embodiment also provides an image spatiotemporal feature point description device, see figure 2 As shown, it includes a processor 21, a memory 22 and a communication bus 23, wherein:

[0064] The communication bus 23 is used to realize connection and communication between the processor 21 and the memory 22;

[0065] The processor 21 is used to execute the program stored in the memory 22, so as to realize the steps of the method for describing the spatio-temporal feature points of the video image in the above-mentioned first embodiment.

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Abstract

The invention discloses a description method of image characteristic points. In the description method of image characteristic points, a descriptor of a space-time characteristic point includes the gray scale information and motion information of a video image; the description method of image characteristic points rotates a wavelet operation value to guarantee rotation invariance of the descriptor; and the obtained wavelet response value used by the descriptor is not only a wavelet response value of the space-time characteristic point, and also includes a wavelet response value of each pixel point in an area in which the space-time characteristic point is taken as the center. Based on above characteristics, the descriptor obtained through the description method of image characteristic points can more accurately represent the video image so as to avoid the problem of represent the video in a one-sided way.

Description

technical field [0001] The present invention relates to the technical field of video processing, and more specifically, relates to an image feature point description method. Background technique [0002] In the existing video characterization methods, a video is often decomposed into multiple single-frame images, and the video is represented by obtaining the grayscale information of the pixels on the video image and based on the grayscale information of the pixels, but a video contains The information is not only the grayscale information of the pixels, but also includes the pixel correlation between the video time series, so the method of characterizing the video is one-sided, and it does not characterize the video according to the time information contained in the video. [0003] Referring to the method of extracting feature points in image pixels in the prior art, and describing the feature points to realize the method of characterizing the image, it can be considered to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46
CPCG06V10/44
Inventor 李岩山杨从柱张力范雷东李庆腾谢维信
Owner 深圳市兴海物联科技有限公司
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