OpenCV——饱和度调整

来源：互联网发布：淘宝二手雅马哈能买吗编辑：程序博客网时间：2024/06/10 07:32
参考：
闲人阿发伯的博客
// define head function#ifndef PS_ALGORITHM_H_INCLUDED#define PS_ALGORITHM_H_INCLUDED#include <iostream>#include <string>#include "cv.h"#include "highgui.h"#include "cxmat.hpp"#include "cxcore.hpp"using namespace std;using namespace cv;void Show_Image(Mat&, const string &);#endif // PS_ALGORITHM_H_INCLUDED/*This program adjustthe saturation.*/#include "PS_Algorithm.h"#include <time.h>using namespace std;using namespace cv;int main(void){    string Img_name("4.jpg");    Mat Img;    Img=imread(Img_name);    Show_Image(Img, Img_name);    Mat Img_out(Img.size(), CV_32FC3);    Img.convertTo(Img_out, CV_32FC3);    Mat Img_in(Img.size(), CV_32FC3);    Img.convertTo(Img_in, CV_32FC3);    // define the iterator of the input image    MatIterator_<Vec3f> inp_begin, inp_end;    inp_begin=Img_in.begin<Vec3f>();    inp_end =Img_in.end<Vec3f>();    // define the iterator of the output image    MatIterator_<Vec3f> out_begin, out_end;    out_begin=Img_out.begin<Vec3f>();    out_end =Img_out.end<Vec3f>();    // increment (-100.0, 100.0)    float Increment=-50.0/100.0;    float delta=0;    float minVal, maxVal;    float t1, t2, t3;    float L,S;    float alpha;    for(; inp_begin!=inp_end; inp_begin++, out_begin++)    {        t1=(*inp_begin)[0];        t2=(*inp_begin)[1];        t3=(*inp_begin)[2];        minVal=std::min(std::min(t1,t2),t3);        maxVal=std::max(std::max(t1,t2),t3);        delta=(maxVal-minVal)/255.0;        L=0.5*(maxVal+minVal)/255.0;        S=std::max(0.5*delta/L, 0.5*delta/(1-L));        if (Increment>0)        {            alpha=max(S, 1-Increment);            alpha=1.0/alpha-1;            (*out_begin)[0]=(*inp_begin)[0]+((*inp_begin)[0]-L*255.0)*alpha;            (*out_begin)[1]=(*inp_begin)[1]+((*inp_begin)[1]-L*255.0)*alpha;            (*out_begin)[2]=(*inp_begin)[2]+((*inp_begin)[2]-L*255.0)*alpha;        }        else        {            alpha=Increment;            (*out_begin)[0]=L*255.0+((*inp_begin)[0]-L*255.0)*(1+alpha);            (*out_begin)[1]=L*255.0+((*inp_begin)[1]-L*255.0)*(1+alpha);            (*out_begin)[2]=L*255.0+((*inp_begin)[2]-L*255.0)*(1+alpha);        }    }    Img_out=Img_out/255.0;    Show_Image(Img_out, "out");    imwrite("out.jpg", Img_out*255);    waitKey();    cout<<"All is well."<<endl;}// define the show image#include "PS_Algorithm.h"#include <iostream>#include <string>using namespace std;using namespace cv;void Show_Image(Mat& Image, const string& str){    namedWindow(str.c_str(),CV_WINDOW_AUTOSIZE);    imshow(str.c_str(), Image);}
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