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Image wide line random testing method

A detection method and wide-line technology, applied in the fields of image processing and computer vision, can solve problems such as WRC calculation redundancy, achieve the effect of improving calculation speed and eliminating redundant calculation amount

Inactive Publication Date: 2013-07-10
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Therefore, the WRC calculation for these pixels is redundant in the flow of the basic USAN wide line detection method

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Embodiment Construction

[0034]The present invention will be described in further detail below in conjunction with the accompanying drawings. For convenience of description, the basic USAN wide line detection method is referred to as the USAN method, and the image wide line random detection method (Randomized USAN Wide Line Detector) provided by the present invention is referred to as the R-USAN method.

[0035] figure 2 It is a schematic diagram of the USAN area and Non-USAN area when the circular template is located at different positions, (a) is a schematic diagram of the USAN area when the center of the circular template is located on the wide line pixel, corresponding to m(x 0 ,y 0 )0 ,y 0 )=πr 2 In the case of , neither the central pixel of the circular template nor the USAN area is a wide-line pixel; (c) is a schematic diagram of the USAN area when the center of the circular template is located near the wide line, corresponding to g≤m(x 0 ,y 0 )2 In the case of , the central pixel of the ...

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Abstract

The invention provides an image wide line random testing method including selecting a pixel in an image at random as a current pixel, calculating the size of a USAN area of the current pixel by means of WRC if the current pixel is not processed, then judging whether the current pixel is located on a wide line or at in a homogeneous background area or an area close to the wide line, calculating the direction of the current wide line if the current pixel is located on the wide line , and finding the next current pixel to be processed along the direction. The image wide line random testing method can eliminate redundant calculation amount in a basic USAN wide line testing method, and remarkably improves the calculation speed, and good testing results are obtained.

Description

technical field [0001] The invention belongs to the field of image processing and computer vision, in particular to a method for extracting wide lines in an image. Background technique [0002] Wide line detection is a basic technology in the field of image processing and computer vision, widely used in the linear structure extraction of various types of images, such as the extraction and recognition of roads, bridges and rivers in satellite / aerial images, medical images for auxiliary diagnosis Extraction of blood vessels in and palmprint extraction for physiological authentication are crucial to the success of subsequent high-level image processing tasks such as matching and recognition. At present, there is no strict definition for wide lines. It is generally considered that a linear structure in an image whose width satisfies 3≤w≤15 and whose length is greater than 20 is a wide line. [0003] The existing wide line detection methods can be roughly divided into two catego...

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Application Information

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IPC IPC(8): G06T7/00G06T7/60
Inventor 曲智国高颖慧王平谭贤四王红王佳王威张毅杨博付瑞罡
Owner NAT UNIV OF DEFENSE TECH
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