An edge enhancement algorithm for ultra-wide-angle images
An edge enhancement, ultra-wide-angle technology, applied in the fields of image processing, computer vision and virtual reality, can solve the problem of lower resolution than the central part, etc., to achieve the effect of improved resolution, real-time high-efficiency resolution, and low algorithm complexity
Active Publication Date: 2021-10-22
湖南优象科技有限公司
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[0004] Aiming at the problems in the prior art that the sharpness of the edge part of the ultra-wide-angle image is obviously lower than that of the central part, the purpose of the present invention is to provide an edge enhancement algorithm for the ultra-wide-angle image, after calculating the mean value of the ultra-wide-angle image on the Y component, through Mean compensation and fusion compensation enhance the edge part of the ultra-wide-angle image to obtain an ultra-wide-angle image with higher definition
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[0045] In order to facilitate the implementation of the present invention, further description will be given below in conjunction with specific examples.
[0046] Such as figure 1 A kind of edge enhancement algorithm for super wide-angle image shown, comprises the following steps:
[0047] S1. Obtain an ultra-wide-angle image, wherein the effective information of all scenes in the ultra-wide-angle image is concentrated in the same circular area;
[0048] S2. Construct the edge enhancement model of the ultra-wide-angle image: set up a plane coordinate system X-O-Y, the ultra-wide-angle image is located in the XOY plane, and obtain the center coordinate (x) of the ultra-wide-angle image A (x, y) 0 ,y 0 ) and radius r;
[0049] S21. Convert the colored ultra-wide-angle image A(x, y) into a grayscale image G(x, y);
[0050] S22. Binarize the grayscale image G(x, y) to obtain a binarized image GB(x, y);
[0051] S23, obtain the circle center coordinates (x of the ultra-wide-an...
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The invention provides an edge enhancement algorithm for ultra-wide-angle images, comprising the following steps: obtaining an ultra-wide-angle image; constructing an edge enhancement model of the ultra-wide-angle image, and obtaining the center coordinates and radius of the ultra-wide-angle image; converting the ultra-wide-angle image from RGB space Transform to YUV space, calculate the mean value of each pixel on the Y component on the ultra-wide-angle image; select the buffer area Ω1 composed of pixels in the ultra-wide-angle image whose distance to the center of the circle is greater than 0.5r, for the pixels in the buffer area Ω1 Perform mean value compensation; select a buffer area Ω2 composed of pixels whose distance to the center of the super wide-angle image is greater than 0.5r and less than 0.75r, and perform fusion compensation on the pixels in the buffer area Ω2; obtain an edge-enhanced ultra-wide-angle image. After calculating the mean value of the super-wide-angle image on the Y component, the edge part of the super-wide-angle image is enhanced through mean compensation and fusion compensation to obtain a super-wide-angle image with higher definition. The invention is applied in the field of image processing.
Description
technical field [0001] The invention relates to the technical fields of image processing, computer vision and virtual reality, in particular to an edge enhancement algorithm for ultra-wide-angle images. Background technique [0002] In recent years, with the continuous development of artificial intelligence, computer vision technology has been more and more widely used. The requirements of many occasions have shown the limitations of the viewing angle range of ordinary lenses. The ultra-wide-angle lens has a large field of view, and can obtain scene information of 189 degrees or even 220 degrees at one time, far exceeding the field of view of the ordinary lens vision system and greatly surpassing the natural observation ability of human beings. This advantage makes it It has been widely used in security monitoring, industrial medical treatment, intelligent transportation and other fields. [0003] Although the large field of view of the ultra-wide-angle lens makes it widel...
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IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/50G06T5/73
Inventor 向北海
Owner 湖南优象科技有限公司