PS色调— —通道混合

    clc;
    clear all;
    close all;

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

    Image=imread('4.jpg');
    Image=double(Image)/255;

    r=Image(:,:,1);
    g=Image(:,:,2);
    b=Image(:,:,3);

    blueGreen=0.5;
    redBlue=0.5;
    greenRed=0.5;

    intoR=0.75;
    intoG=0.25,
    intoB=0.25;

    N_R=(intoR * (blueGreen*g+(1-blueGreen)*b) + (1-intoR)*r);
    N_G=(intoG * (redBlue*b+(1-redBlue)*r) + (1-intoG)*g);
    N_B=(intoB * (greenRed*r+(1-greenRed)*g) + (1-intoB)*b);

    Img_new(:, :, 1)=N_R;
    Img_new(:, :, 2)=N_G;
    Img_new(:, :, 3)=N_B;

    imshow(Img_new);
    imwrite(Img_new, 'out.jpg');

参考来源：http://www.jhlabs.com/index.html

原图：

效果图：