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Method for detecting object contour based on phase characteristic

A technology of contour detection and phase characteristics, applied in image data processing, instruments, calculations, etc., can solve problems such as difficulty in contour extraction, and achieve the effect of ensuring integrity and texture suppression.

Inactive Publication Date: 2011-10-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing non-classical receptive field suppression contour detection method is difficult to extract the contour of the low-contrast image, and proposes an object contour detection method based on phase characteristics

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  • Method for detecting object contour based on phase characteristic
  • Method for detecting object contour based on phase characteristic
  • Method for detecting object contour based on phase characteristic

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Embodiment Construction

[0014] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific examples.

[0015] Taking the contour detection of a natural image as an example, the contour detection of the image after adding 20dB Gauss noise to it is similar to this.

[0016] Download the Basket (basket) image and its corresponding standard contour detection results from the currently internationally recognized image library website that verifies the effect of the contour extraction algorithm. The image size is 512×512. The standard contour detection results (ground truth) are obtained by The average value obtained after manual sketching by multiple people. The process of the specific detection method is as follows: figure 1 As shown, the specific process is as follows:

[0017] S1. Filtering processing: the number of scale parameters of the given log Gabor filter bank is 4, and 8 orientations are taken within the range of 180°, and the orientation ...

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Abstract

The invention belongs to the technical field of machine vision and discloses a method for detecting an object contour based on a phase characteristic, which is disclosed specific to the problem of difficulty in extracting a contour from a position with low image contrast existing in a method for detecting a non-classical receptive field suppression contour. The method specifically comprises the following steps of: filtering; drawing a characteristic pattern; drawing a characteristic pattern which is subjected to edge preserving smooth filtering; and drawing a contour image which is subjected to non-classical receptive field suppression and performing binaryzation. In the contour detection method, the integrity of the characteristic is kept by using the phase characteristic of an image as well as the stability and importance of image phase information, so that contour detection is not influenced by the inconsistence of image brightness or the change of contrast; and moreover, a target contour is effectively distinguished from a texture edge in combination with a non-classical receptive field characteristic in a human vision mechanism, and textures are suppressed.

Description

technical field [0001] The invention belongs to the technical field of machine vision, and in particular relates to a method for detecting object contours. Background technique [0002] The human visual system can perform various subjective adjustments and processing on the input image information according to changes in the visual environment and conditions. So far, the more representative contour detection method based on the visual mechanism is the non-classical receptive field suppression contour For detection methods, please refer to literature: Grigorescu C, Petkov N, Westenberg M, Contour detection based on nonclassical receptive field inhibition, IEEE Transactions on Image Processing, vol.12, no.7, 729-739, 2003. This method uses the inhibitory properties of the non-classical receptive field of the primary visual cortex neurons to suppress the background texture information, and then achieve the purpose of highlighting the outline of the target object, including isot...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 李永杰李雪菲杨开富李朝义
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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