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A video image sharpening method and image processing device
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A video image and sharpening technology, applied in the field of image processing, can solve the problems of video image noise amplification, enhanced video image edges and details, weak edges are not obvious, etc., to avoid noise and achieve good sharpening effect.
Active Publication Date: 2021-06-11
ARKMICRO TECH
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[0004] The object of the present invention is to provide a video image sharpening method, a computer-readable storage medium and an image processing device, aiming to solve the problem that the weak edges in the image are not obvious in the video image sharpening method of the prior art, and the enhancement of the video image At the same time as the edges and details, the noise of the video image will also be over-amplified, which will affect the quality of the video image
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Embodiment 1
[0023] see figure 1 , the video image sharpening method provided by Embodiment 1 of the present invention includes the following steps: It should be noted that if there are substantially the same results, the video image sharpening method of the present invention does not use figure 1 The flow sequence shown is limited.
[0024] S101. Line-buffer the input pixel information to obtain pixels in an N*N area, where N is an integer greater than 1.
[0025] The pixel information may be a pixel luminance signal or a pixel chrominance signal.
[0026] In Embodiment 1 of the present invention, N usually takes 3, 5 or 7, and of course it can also be other integers. Comprehensive effects, hardware consumption, etc., N is preferably 5.
[0027] Assuming that N is 5, in the pixels in the 5*5 area, use D11, D12, D13, D14, D15 to represent the first row of pixels, D21, D22, D23, D24, D25 to represent the second row of pixels, D31 , D32, D33, D34, D35 represent the third row of pixels, D...
Embodiment 2
[0056] Embodiment 2 of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the video image sharpening method provided in Embodiment 1 of the present invention is implemented. A step of.
Embodiment 3
[0058] Figure 4 A specific structural block diagram of an image processing device provided in Embodiment 3 of the present invention is shown. An image processing device 100 includes: one or more processors 101, memory 102, and one or more computer programs, wherein the processor 101 and the memory 102 are connected by a bus, the one or more computer programs are stored in the memory 102, and configured to be executed by the one or more processors 101, and the processor 101 executes the The steps of the video image sharpening method provided in Embodiment 1 of the present invention are implemented when the computer program is described.
[0059] The image processing device provided in Embodiment 3 of the present invention may be a video camera or the like.
[0060] In the present invention, since the pixel is sharpened in two stages, the sharpening effect is better; and since the accumulated value representing the boundary information of the central pixel point is taken as an...
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Abstract
The invention is applicable to the field of image processing, and provides a video image sharpening method and image processing equipment. The method includes: line-buffering the input pixel information to obtain the pixels in the N*N area; multiplying each pixel by the corresponding coefficient, and accumulating to obtain the accumulated value; and separately calculating the center pixel in multiple directions the sharpness; take the absolute value of the accumulated value to obtain different gain coefficients at different boundaries, multiply the gain coefficient by the gain adjustment value to obtain a new gain coefficient, multiply the accumulated value by the new gain coefficient, and multiply the multiplied value is added to the original central pixel to obtain the first-level sharpening value; compare the sharpness of the central pixel in multiple directions, take the maximum value and multiply it by the second-level sharpening gain as the second-level sharpening value; in the original central pixel Add the first level sharpening value and the second level sharpening value to the point to get the sharpening result of the center pixel. The sharpening effect of the present invention is good, strong sharpening can also be performed on weak boundaries, and for noise, the sharpening gain can be suppressed to the minimum, avoiding excessively enlarged image noise.
Description
technical field [0001] The invention belongs to the field of image processing, in particular to a video image sharpening method and image processing equipment. Background technique [0002] The image information collected by the video camera will contain noise information due to factors such as the physical limitations of the image sensor itself, the working environment, and the temperature of the image sensor. During the transmission and processing of video images, smoothing and filtering are often performed on video images. Although noise can be suppressed, the contours and details of video images will inevitably be blurred, resulting in unclear contours and details of video images. Through image sharpening, the outline of the image can be compensated, and the edges, details and grayscale jumps of the image can be enhanced to make the image clearer. [0003] The video image sharpening methods in the prior art mainly preserve the edge information by superimposing the fuzzy...
Claims
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