使用OpenCV可以提分别提取显示一张图片(或者视频)的R,G,B颜色分量。效果如下。
原图:
R:
G:
B:
示例代码如下,貌似很久以前网上找的的,逻辑很清晰,就是把R,G,B三个分量分开,然后显示出来,就不注释了。
#include "cv.h"#include "highgui.h"#include <cxcore.h>void main(int argc,char **argv){ IplImage *img=cvLoadImage("test.bmp",1); IplImage *channel_r=cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,1); IplImage *channel_g=cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,1); IplImage *channel_b=cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,1); IplImage *img_r=cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,3); IplImage *img_g=cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,3); IplImage *img_b=cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,3); cvSplit(img,channel_b,channel_g,channel_r,NULL);cvMerge(channel_b,0,0,0,img_b);cvMerge(0,channel_g,0,0,img_g);cvMerge(0,0,channel_r,0,img_r);cvNamedWindow("ImageOrigin",CV_WINDOW_AUTOSIZE);cvNamedWindow("Image_R",CV_WINDOW_AUTOSIZE);cvNamedWindow("Image_G",CV_WINDOW_AUTOSIZE);cvNamedWindow("Image_B",CV_WINDOW_AUTOSIZE);cvShowImage("ImageOrigin",img);cvShowImage("Image_R",img_r);cvShowImage("Image_G",img_g);cvShowImage("Image_B",img_b);cvSaveImage("img_red.bmp",img_r);cvSaveImage("img_green.bmp",img_g);cvSaveImage("img_blue.bmp",img_b);cvWaitKey(0);cvReleaseImage(&img);cvReleaseImage(&img_r);cvReleaseImage(&img_g);cvReleaseImage(&img_b);cvDestroyAllWindows();}