PS 滤镜——旋转模糊

这里给出灰度图像的模糊算法，彩色图像只要分别对三个通道做模糊即可。

%%  spin blur

% 旋转模糊

clc;

clear all;

close all;

I=imread(‘4.jpg‘);

I=double(I);

% % % I_new=I;

% % % for kk=1:3

% % %     I_new(:,:,kk)=Spin_blur_Fun(I(:,:,kk), 30, 30);

% % % end

% % % imshow(I_new/255)

Image=I;

Image=0.2989 * I(:,:,1) + 0.5870 * I(:,:,2) + 0.1140 * I(:,:,3);

[row, col]=size(Image);

Image_new=Image;

Center_X=(col+1)/2;

Center_Y=(row+1)/2;

validPoint=1;

angle=5;

radian=angle*pi/180;

radian2=radian*radian;

Num=30;

Num2=Num*Num;

for i=1:row

for j=1:col

validPoint=1;

x0=j-Center_X;

y0=Center_Y-i;

x1=x0;

y1=y0;

Sum_Pixel=Image(i,j);

for k=1:Num

x0=x1;

y0=y1;

%%% 逆时针

% x1=x0-radian*y0/Num-radian2*x0/Num2;

% y1=y0+radian*x0/Num-radian2*y0/Num2;

%%% 顺时针

x1=x0+radian*y0/Num-radian2*x0/Num2;

y1=y0-radian*x0/Num-radian2*y0/Num2;

x=floor(x1+Center_X);

y=floor(Center_Y-y1);

if(x>1 && x<col && y>1 && y<row)

validPoint=validPoint+1;

Sum_Pixel=Sum_Pixel+Image(y,x);

end

end

Image_new(i,j)=Sum_Pixel/validPoint;

end

end

imshow(Image_new/255);

原图

效果图

效果图