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Quick detection method of ridge-type edge in image

A detection method and technology in images, applied in the field of image processing, can solve problems such as slow speed and affecting real-time performance

Active Publication Date: 2018-02-23
安徽慧视金瞳科技有限公司
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Problems solved by technology

[0003] At present, the mainstream roof edge detection method is based on the stroke detection operator strategy. Although the method works well, the speed is very slow, which seriously affects the real-time performance.

Method used

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Embodiment Construction

[0072] Roof-shaped edge refers to a special edge in the image. On the brightness curve in the vertical direction of this edge, it shows the law of high brightness in the middle and low brightness on both sides; or low brightness in the middle and high brightness on both sides; typical A large number of roof-shaped edges appear in life;

[0073] The fast detection method of this roof type edge in the described image comprises the following steps:

[0074] 1), scan the image, perform grayscale processing on the scanned image, and calculate the horizontal gradient value of each pixel in the grayscaled image, and realize the image according to the horizontal gradient value and the threshold relationship of each pixel Preliminary detection of all rising edge points and falling edge points of the middle roof edge, as follows:

[0075] 1.1), the scanned image is grayscaled to obtain a binary image:

[0076] In order to facilitate the calculation of the gradient value, it is necessa...

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Abstract

The invention belongs to the technical field of image processing and particularly relates to a quick detection method of a ridge-type edge in an image. The method comprises the steps of (1) carrying out preliminary detection of all edge points of a ridge-type edge in an image, (2) realizing the precise detection of rising and falling edge points through an edge communication area, (3) reducing theimage to obtaining images of different scales, carrying out operations of step (1) and step (2) on an image of each scale, obtaining edge points at each scale, and carrying out fusion to complete original image edge detection, (4) extracting pixels at two sides of the ridge-type edge to be content of the ridge-type edge according to skeletal pixels in the edge communication area, and realizing the ridge-type edge content detection, and (5) eliminating a fractured ridge-type edge and further improving a detection result. According to the method, the pixel brightness distribution characteristics of the ridge-type edge are used, and the quick detection of the ridge-type edge in the image is realized through the pairing analysis of the rising and falling edge points.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for quickly detecting a roof-shaped edge in an image. Background technique [0002] In the fields related to image processing and computer vision, it is often necessary to detect a large number of roof-shaped edges (high brightness in the middle and low brightness on both sides; or low brightness in the middle and high brightness on both sides); this is because the roof-shaped edge is in daily images. The probability of occurrence is relatively high, and it is a relatively stable feature; [0003] At present, the mainstream roof edge detection method is based on the stroke detection operator strategy. Although the method works well, the speed is very slow, which seriously affects the real-time performance. Contents of the invention [0004] Aiming at the deficiencies and defects of the prior art, the present invention provides a rapid detection me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/13G06T7/181G06T5/00
CPCG06T7/13G06T7/181G06T5/70
Inventor 汪俊锋邓宏平戴平栾庆磊
Owner 安徽慧视金瞳科技有限公司
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