Blocking noise variance estimation based image accumulation signal to noise ratio calculation method
A noise variance estimation and calculation method technology, which is applied in calculation, image analysis, image data processing, etc., can solve the problem of rough division of uniform image intensity areas, unstable calculation results of signal-to-noise ratio, and limited application of image signal-to-noise ratio evaluation algorithms, etc. problem, to achieve the effect of consistent visual experience, good monotony and applicability
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[0054] Algorithm flow chart of the present invention is as figure 1 shown.
[0055] by figure 2 The shown image is a target test legend, which is used to demonstrate the processing flow and result effectiveness of the algorithm of the present invention. In order to facilitate the display, in figure 2 A certain level of Gaussian white noise is added on the basis of the clear image, and the image to be calculated as the input signal-to-noise ratio, such as image 3 (a) shown.
[0056] Utilize the method of the present invention to process image, can at first obtain the result of watershed segmentation algorithm, display with the segmentation result of gray scale image, as image 3 As shown in (b), the segmentation method divides the image into several image blocks of equal size, mutual disjointness, and uniform intensity. And after optimizing the processing of the affine reconstruction results, it can be obtained as image 3 (c) Affine reconstruction result plot shown. I...
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