Image sharpening method and device
An image sharpening and image technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problem that the gain of sharpening enhancement cannot conform to the enhancement function, cannot improve the visual effect of the image, and does not use the visual characteristics of the human eye.
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[0052] In order for those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0053] like figure 1 As shown, an image sharpening method S100 includes:
[0054] Step S110, convert the image frame to be sharpened from the RGB color space to the YUV color space, and perform Gaussian low-pass filtering on the Y luminance component to obtain the Y luminance low-pass component Y low, for the Y luminance component and the Y luminance low-pass component Y low Find the difference to get the high-frequency component Y of the Y brightness hig ;
[0055] Step S120: Perform filtering processing on the Y luminance component according to a preset filter operator to obtain the Y luminance image background Y bg ;
[0056] Step S130: Calculate the image gradient map of the Y brightness component according to the preset...
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