PS滤镜— —波浪效果

    clc;

    clear all;

    close all;

    addpath('E:\PhotoShop Algortihm\Image Processing\PS Algorithm');

    I=imread('4.jpg');

    I=double(I);

    Image=I/255;

    xAmplitude = 25.0;

    yAmplitude = 25.0;

    xWavelength =32.0

    yWavelength = 32.0;

    SINE=1;

    SAWTOOTH=2;

    TRIANGLE=3;

    NOISE=4;

    [height, width, depth]=size(Image);

    Image_new=Image;

    wavetype=1;

    [ind, g1, g2, g3]=init_arr();

    for ii=1:height

        for jj=1:width

             nx = ii / xWavelength;

             ny = jj / yWavelength;

             switch wavetype

                 case 1

                     fx=sin(nx);

                     fy=sin(ny);

                 case 2

                     fx=mod(nx, 1);

                     fy=mod(ny, 1);

                 case 3

                     fx=triangle(nx);

                     fy=triangle(ny);

                 case 4

                     fx=Noise1(nx, ind, g1);

                     fy=Noise1(ny, ind, g1);

             end

             x=jj+xAmplitude * fx;

             y=ii+yAmplitude * fy;

             % %         if (x<=1)     x=1;  end

    % %         if (x>=width)   x=width-1; end;

    % %         if (y>=height)  y=height-1; end;

    % %         if (y<1)  y=1;     end;

    % %

            if (x<=1)     continue;  end

            if (x>=width)   continue; end;

            if (y>=height)  continue; end;

            if (y<1)  continue;     end;

            x1=floor(x);

            y1=floor(y);

            p=x-x1;

            q=y-y1;

            Image_new(ii,jj,:)=(1-p)*(1-q)*Image(y1,x1,:)+p*(1-q)*Image(y1,x1+1,:)...

                +q*(1-p)*Image(y1+1,x1,:)+p*q*Image(y1+1,x1+1,:);

        end

    end

    imshow(Image_new)

    imwrite(Image_new, 'out.jpg');

参考来源：http://www.jhlabs.com/index.html

原图：

效果图：