Method and device for recognizing plane geometrical shapes

A technology of plane geometry and geometric shape, applied in the field of pattern recognition, can solve the problems of wrong judgment and low recognition speed, and achieve the effect of simple calculation method and low recognition speed.

Active Publication Date: 2013-03-06
NEW FOUNDER HLDG DEV LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects existing in the prior art, the object of the present invention is to provide a method for recognizing plane geometric shapes, which is used to solve the defects of low recognition speed and judgment errors existing in the prior art

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  • Method and device for recognizing plane geometrical shapes
  • Method and device for recognizing plane geometrical shapes
  • Method and device for recognizing plane geometrical shapes

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Embodiment 1

[0042] Such as figure 1 As shown, the present embodiment provides a method for recognizing plane geometric shapes, comprising the following steps:

[0043] Step 101, obtaining feature information for the target plane geometric shape, and saving the feature information of the target plane geometric shape;

[0044]Find the curvature of the boundary curve of the target plane geometry according to a certain direction; find a reference point that is invariant relative to the boundary of the plane geometry; search for feature points on the boundary curve along the direction of calculating the curvature of the boundary curve; feature points include: boundary At least one point on the curve where the curvature is extreme, the curvature is positive or negative infinity, and the curvature is constant. It may further include: at least one point where the curvature changes monotonically. A set of feature point information is calculated according to the obtained feature point, reference ...

Embodiment 2

[0167] Embodiment 2 of the present invention passes to Figure 8 The characteristic information of the shown target geometric shape is obtained to realize the characteristic description of the target geometric shape, and the characteristic information of the target geometric shape is saved to complete the memory process of the target. The obtaining process is omitted.

[0168] Figure 8 Among them, (a) is a rectangle, (b) is a triangle, and (c) is an arbitrary shape. (a), (b), (c) pc in the figure is the reference point of the geometric shape, t Z1 ~t Zn It is a set of feature point information of the geometric shape. The feature information of each geometric shape includes a set of feature point information and basic retrieval information. According to Embodiment 1, the basic retrieval information of each geometric shape characteristic information is obtained. The obtained results are as follows:

[0169] The basic retrieval information is recorded as js(k l , n t , ...

Embodiment 3

[0199] This embodiment provides a recognition device for plane geometry, such as Figure 11 As shown, the device includes:

[0200] The target feature information extraction module 111 is used to obtain and save the feature information of the target plane geometry, the feature information includes at least one set of feature point information;

[0201]The target feature information extraction module 111 includes:

[0202] The first submodule is used to calculate the boundary curve of the obtained plane geometry according to a certain direction, and obtain the curvature information of each point on the boundary curve;

[0203] The second submodule is used to obtain the reference point of the boundary curve of the plane geometry;

[0204] The third sub-module is used to obtain the feature points on the boundary curve of the plane geometry that indicate the curvature change feature;

[0205] The fourth sub-module is used to calculate feature point information according to the ...

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Abstract

The invention discloses a method and a device for recognizing plane geometrical shapes, which belongs to the basic technical category of the pattern recognition field. The method comprises the following steps: seeking and saving characteristic information of target plane geometrical shapes; choosing the characteristic information of at least one target plane geometrical shape to construct a recognition target set; seeking the characteristic information of a plane geometrical shape to be recognized; utilizing characteristic-point information to analyze the similarity of the characteristic information of a plane geometrical shape to be recognized and the characteristic information of every target plane geometrical shape in the recognition target set according to cyclic sorting relation; and outputting decided recognition results. The invention also discloses a device for recognizing plane geometrical shapes, which comprises a module for extracting target characteristic information, a module for creating the target set, a module for extracting characteristic information to be recognized, and a recognition module. The invention has the advantages of simple method for seeking the characteristic information, greatly reduced calculation amount, uniform recognition rule and rapid accurate recognition effect.

Description

technical field [0001] The invention relates to the field of pattern recognition, in particular to a method and device for recognizing plane geometric shapes. Background technique [0002] Geometric shape recognition is the basic technology of graphics and image recognition in the field of pattern recognition. In artificial intelligence, computer vision, robotics, image target recognition, optical character reader (Optical Character Reader, OCR), military and other high-tech fields, geometric shape recognition technology plays a key role. Geometric shape recognition is realized based on the mathematical description method of shape features, feature information extraction technology and recognition technology using feature information. [0003] In the prior art, the mathematical description of graphics is mainly based on two theoretical systems. One is the Fourier descriptor theory based on integral transform, which transforms the image information from the time domain to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/52G06K9/46
Inventor 曾培祥
Owner NEW FOUNDER HLDG DEV LLC
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