A method and device for removing impulse noise
An impulse noise and noise technology, applied in the field of impulse noise removal, can solve the problem of inability to take into account image clarity, and achieve the effect of taking into account the sharpness, removing impulse noise, and maintaining no sudden change
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Embodiment 1
[0034] figure 1 It is an implementation flowchart of the method for removing impulse noise provided by the embodiment of the present invention, and is described in detail as follows:
[0035] In step S101, the image to be filtered is acquired;
[0036] The user equipment acquires the image to be filtered.
[0037] The image to be filtered represents an image that needs to be denoised.
[0038] In step S102, filter the image using a first-type median filter to generate a first filtering result of the image after the first median filter;
[0039] In step S103, according to the original input data of the image and the first filtering result, assign a noise level coefficient to each pixel of the image;
[0040] According to the pixel matrix of the original input data and the pixel matrix of the first filtering result, assign a noise level coefficient to each pixel of the image.
[0041] Wherein, the pixel value in the pixel matrix of the original input data is subtracted from ...
Embodiment 2
[0076] Image 6 It is an implementation flowchart of step S103 of the method for removing impulse noise provided by the embodiment of the present invention, and is described in detail as follows:
[0077] In step S601, calculating the difference between the pixel value of the pixel in the original input data and the pixel value of the pixel in the first filtering result, and then taking the absolute value;
[0078] In step S602, the absolute value is subtracted from a preset noise threshold to generate a difference, and the difference is multiplied by the rate of change to obtain a noise level coefficient corresponding to the pixel.
[0079] The rate of change K is a user-defined parameter. From a mathematical point of view, it is figure 2 The slope corresponding to that slash. From the image effect, it is the degree of noise reduction that the user wants.
[0080] When K tends to 0, the noise reduction area of the image tends not to be denoised; when K tends to infinit...
Embodiment 3
[0082] The implementation process of step S105 of the method for removing impulse noise provided by the embodiment of the present invention is described in detail as follows:
[0083] Obtain the pixel value of the pixel in the original input data;
[0084] Obtain the pixel value of the pixel in the second filtering result;
[0085] According to the pre-established mixing model and the noise level coefficient, the same pixel is mixed, and the mixed filtering result is output to remove the impulse noise in the image.
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