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资源说明：clc;clear all;close all;
I = imread('finger.bmp');I = double(I);
figure,imshow(uint8(I)),title('Orignal image');
y = I;
sigma = 1;% need some modification according image
rol = 3;% need some modification according image
dt = 0.1; % timestep, more smaller, more better result
gamma = 0.000001; % lamda in the direction of gradient
Cm = eps; % very small value
Numiter = 100;% iteration num
filter = fspecial('gaussian',3,1);
y = imfilter(I,filter,'replicate');
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