Method for acquiring image shape feature descriptor

A technology of shape features and acquisition methods, applied in the field of image recognition, can solve the problems of inconsistent images of measurement units, incomplete comparability conditions, and the inability to retrieve identical or similar images to achieve enhanced matching effects, better descriptions, and better descriptions full effect

Active Publication Date: 2020-01-24
徐庆 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for acquiring image shape feature descriptors, aiming at solving the problem of non-uniform measurement units of image shape feature points or

Method used

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  • Method for acquiring image shape feature descriptor
  • Method for acquiring image shape feature descriptor

Examples

Experimental program
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Example

[0221] Example 1

[0222] Assuming that there are 8 line-direction intervals in the connected domain of a certain color block of a certain graph, the line lengths of the boundary acentric chakra after smoothing are: 65.3, 78.2, 54.6, 43.4, 28.3, 63.5, 68.1, 75.1, and the number of line-direction intervals Respectively: 89, 36, 22, 33, 90, 35, 22, 33, find "the set of the interval value Ia and the alternate interval value Ib of the ratio of the line length of the boundary heart chakra" and "the angle of the line direction interval The proportion of the number of equal parts of the interval value IIa and the alternate interval value IIb set" image descriptor.

[0223] solution:

[0224] (1) Find "the set of the interval value Ⅰa and the alternate interval value Ⅰb of the ratio of the length of the boundary heart chakra line"

[0225] (1) Determine the length of the reference boundary heart chakra line

[0226] The maximum value of the heart chakra length in this example is 78.2, which i...

Example

[0298] Example 2

[0299] Assuming that there are 6 heart lines in a picture, their length values ​​in the clockwise direction are 19.8, 20.3, 29.9, 40.4, 36.1, 100, and the relative heart line angles in the clockwise direction are 36.3, 42.5, 63.8. , 72.1, 20.6, 124.7, find the image descriptor of the set of the ratio of the image core line length Ⅲa and the alternate interval value Ⅲb, the ratio of the image core line angle Ⅳa and the alternate interval The image descriptor of the set of values ​​IVb.

[0300] solution:

[0301] (1) Find the image descriptor of the set of the ratio of the length of the image's heart-cord line, the equal interval value Ⅲa and the alternate interval value Ⅲb

[0302] (1) Determine the length of the reference heart line

[0303] The maximum length of the heart cord is 100, which is the reference cord length.

[0304] (2) Calculate the line length ratio of the heart line

[0305] The line length ratio of the heart line refers to the ratio of the line leng...

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Abstract

The invention provides a method for acquiring an image shape feature descriptor, which comprises the following steps: S1, extracting a contour line of a color block connected domain of an input imageand position data of pixel points on the contour line, smoothing the contour line, and acquiring the smoothed contour line and a gravity center point of the color block connected domain; S2, performing coordinate conversion of the image standard pixel size on the boundary point of the linear interval in the smoothed color block connected domain contour line, the image gravity center point and theimage color block connected domain gravity center point; S3, obtaining a line length proportion number and a line direction interval angle proportion number of the converted line direction interval boundary center wheel line; and S4, performing numerical interval classification on the proportion number of the line length of the boundary center line, the proportion number of the angle number of theline direction interval, the proportion number of the line length of the image center line and the proportion number of the line angle of the image center line, and generating an image shape featuredescriptor. According to the method, the recall ratio and the precision ratio of image retrieval can be improved, and the matching effect of the same or similar images in image recognition retrieval is enhanced.

Description

technical field [0001] The invention relates to the field of image recognition, in particular to a method for acquiring image shape feature descriptors. Background technique [0002] Image descriptors are generally used to describe feature points. The image descriptors disclosed in the prior art are generally a set of vectors, including information such as position, direction, and scale of feature points. Common feature points are some stable points in the image, such as corner points, edge points, bright points in dark areas, dark points in bright areas, etc. A good set of descriptors should have distinction and commonality. Distinction means that the descriptor can reflect the feature points that distinguish one image from another, making the descriptor unique to the image; common Sexuality means that the descriptor can reflect an image and other identical or similar images with the same feature points, so that the descriptor has common feature points for the same or simi...

Claims

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Application Information

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IPC IPC(8): G06F16/55G06F16/583
CPCG06F16/55G06F16/583
Inventor 徐庆
Owner 徐庆
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