OPENCV中 RGB 转换到 HSI空间

来源：互联网发布：小鸣单车知乎编辑：程序博客网时间：2024/05/16 05:39

本文实现了RGB空间转换到HSI空间，并分别求出S分量（饱和度）、I分量（亮度、光强）

#include "stdafx.h"#include "highgui.h"#include"cv.h"int main(int argc, char *argv[]){  IplImage *img = cvLoadImage("G:\\huo.jpg"); IplImage *r  = cvCreateImage( cvGetSize(img), img->depth, 1); IplImage *g  = cvCreateImage( cvGetSize(img), img->depth, 1); IplImage *b  = cvCreateImage( cvGetSize(img), img->depth, 1); CvMat *rmat = cvCreateMat( img->height, img->width, CV_32FC1); CvMat *gmat = cvCreateMat( img->height, img->width, CV_32FC1); CvMat *bmat = cvCreateMat( img->height, img->width, CV_32FC1); CvMat *temp1 = cvCreateMat( img->height, img->width, CV_32FC1); CvMat *temp2 = cvCreateMat( img->height, img->width, CV_32FC1); CvMat *temp3 = cvCreateMat( img->height, img->width, CV_32FC1); cvNamedWindow("saturation", 1); cvNamedWindow("intensity", 1); cvSplit( img, b, g, r, NULL); cvConvert(b, bmat); cvConvert(g, gmat); cvConvert(r, rmat); //计算饱和度S cvMin( bmat, gmat, temp1); cvMin( rmat, temp1, temp1); cvAdd( bmat, gmat, temp2 ); cvAdd( temp2, rmat, temp2); cvDiv( temp1, temp2, temp3, 765.0); cvAbsDiffS( temp3, temp3, cvScalarAll( 255.0 )); cvConvert( temp3, r ); //计算亮度I cvAddWeighted( bmat, 1.0/3.0, rmat, 1.0/3.0, 0.0, bmat ); cvAddWeighted( bmat, 1.0, gmat, 1.0/3.0, 0.0, bmat); cvConvert( bmat, g );  cvShowImage("saturation", r); cvShowImage( "intensity", g); cvWaitKey(0); cvReleaseImage(&img); cvDestroyWindow("saturation"); cvDestroyWindow("intensity");   return 0;}