Construction method of shape descriptor and image retrieval method based on descriptor

A shape description and construction method technology, applied in character and pattern recognition, special data processing applications, instruments, etc., can solve problems such as poor noise resistance, small contours that cannot be effectively distinguished, and large numbers

Active Publication Date: 2013-07-31
XIANGTAN UNIV
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the Zernike moment can effectively describe the global information of the shape, but it cannot effectively distinguish the deformation of the small contour
Feature points such as corner points can

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
  • Construction method of shape descriptor and image retrieval method based on descriptor
  • Construction method of shape descriptor and image retrieval method based on descriptor
  • Construction method of shape descriptor and image retrieval method based on descriptor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0078] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing:

[0079] Such as figure 1 As shown, the shape descriptor construction includes the following steps:

[0080] Step 101, image preprocessing; in order to better extract shape features, it is generally necessary to denoise the image, scale the shape size in the image to the same size (generally 256×256 pixels), etc.

[0081] Step 102, constructing a contour-based shape descriptor;

[0082] Step 103, constructing a region-based shape descriptor;

[0083] Step 104, constructing a shape descriptor.

[0084] Such as figure 2 As shown, the contour-based shape descriptor construction includes the following steps:

[0085] Step 201, extracting the contour of the shape; using the Canny operator to extract the contour of the shape, and obtaining the contour point coordinates of the outermost layer of the shape in clockwise order through a contour tracking al...

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 construction method of a shape descriptor and an image retrieval method based on the descriptor. The construction method of the shape descriptor comprises the following steps: (a) describing a triangular space relationship between two adjacent sampling contour points and a shape mass center by using an only K value, and combining a K value histogram obtained according to K value distribution and a mass center distance histogram obtained according to the distance between the contour points and the shape mass center to construct a new shape descriptor based on contour; (b) clustering the shape contour points, taking the obtained clustering center as new feature points, taking the feature of a clustering region as the feature value of the corresponding feature points, describing a triangular space relationship of the feature of the combined objects between any two new feature point objects and a reference object by using an only L value, and constructing a new shape descriptor based on a region by using one group of L values obtained by each shape and 4-step Zernike matrix; and (c) composing the shape descriptor of the invention by the descriptors based on contour and region. Based on the shape descriptor of the invention, the invention further provides the image retrieval method.

Description

technical field [0001] The present invention relates to a descriptor construction method and image retrieval technology for feature extraction, more specifically, a shape descriptor construction method for shape feature extraction and an image retrieval method based on shape descriptors. Background technique [0002] Shape is one of the most important characteristics of an object. It plays an important role in human visual perception and has a wide range of applications in many computer vision fields, such as object classification, object recognition, and object retrieval. Shape descriptors are used to describe shape features and are generally divided into contour-based shape descriptors and region-based shape descriptors. [0003] Commonly used contour-based shape descriptors generally only represent the characteristics of a single contour point, and seldom consider describing the spatial characteristics between two adjacent contour points. In the non-patent literature (H...

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
IPC IPC(8): G06F17/30G06K9/62
Inventor 高协平仇权
Owner XIANGTAN UNIV
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