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A Fast Detection Method of Roof Edge in Image

A detection method and image technology, applied in the field of image processing, can solve problems affecting real-time performance, slow speed, etc., and achieve the effect of improving accuracy

Active Publication Date: 2020-11-03
安徽慧视金瞳科技有限公司
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AI Technical Summary

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 disclosure of the present invention belongs to the technical field of image processing, and specifically relates to a method for rapid detection of roof-shaped edges in an image, which specifically includes the following steps: 1), preliminary detection of all edge points of the roof-shaped edges in the image; 2), through the edge The connected area achieves accurate detection of rising edge points and falling edge points; 3), reduce the image to obtain images of different scales, repeat steps 1) and 2) for each scale image to obtain edge points at each scale, and fuse Complete the edge detection of the original image; 4) Extract the pixels on both sides of the roof-shaped edge based on the skeleton pixels in the connected domain of edge points as the content of the roof-shaped edge to realize the content detection of the roof-shaped edge; 5) Exclude the broken roof-shaped edges to further Improve test results. The present invention utilizes the pixel brightness distribution characteristics of the roof-shaped edge, and realizes high-speed detection of the roof-shaped edge in the image by performing paired analysis on the rising edge points and the 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 Patents(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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