继续探索OpenCV[学习ing]

学习了其他一些图像处理的函数，在上一个程序的基础上测试一下。【详见注释】

1 #include <cv.h>

2 #include <highgui.h>

3 #include <iostream.h>

4 #include <stdlib.h>

5

6 //定义宏

7 #define CV_IMAGE_ELEM(img, T,pt,c)\

8 &((T*)(img->imageData+img->widthStep*pt.y))[pt.x*img->nChannels + c]

9

10 void main(int argc,char*argv[])

11 {

12 IplImage*img1=0,*img2=0;

13 int height,width,step,channel;

14 uchar *data;

15 CvPoint pt=cvPoint(100,100);

16 /*if (argc<3)

17 {

18 cout<<"ERROR:Please Enter the Names of TWO Images!"<<endl;

19 exit(0);

20 }*/

21 argv[1]="Lena.jpg";

22 argv[2]="temp.jpg";

23 img1=cvLoadImage(argv[1],1);

24 if(!img1)

25 {

26 cout<<"File open ERROR!!"<<endl;

27 exit(0);

28 }

29 height=img1->height;

30 width=img1->width;

31 step=img1->widthStep;

32 channel=img1->nChannels;

33 data=(uchar*)img1->imageData;

34

35 //改变img1中pt点的像素值

36 uchar* Ptemp=CV_IMAGE_ELEM(img1,uchar,pt,0);

37 Ptemp[0]+=30;

38 Ptemp[1]+=30;

39 Ptemp[2]+=30;

40

41 //创建新图像img2(两种方法：第一种只创建空间，并不初始化里面的数据；第二种：创建并初始化数据）

42 img2=cvCreateImageHeader(cvGetSize(img1),img1->depth,channel);

43 cvCreateData(img2);

44 //img2=cvCreateImage(cvGetSize(img1),img1->depth,channel);

45 //cvCopyImage(img1,img2,NULL);

46

47 cvNamedWindow(argv[1],CV_WINDOW_AUTOSIZE);

48 cvMoveWindow(argv[1],0,0);

49 cvNamedWindow("Befoer Process",CV_WINDOW_AUTOSIZE);

50 cvShowImage("Befoer Process",img1);

51 cvSetImageROI(img1,cvRect(width/2,0,width/2,height)); //设置ROI(兴趣区域)

52 //类似的函数还有cvSetImageCOI(设置兴趣通道)cvResetImageROI(重设兴趣区域)

53 //cvGetImageROI(获取兴趣区域)cvGetImageCOI(获得兴趣通道)

54 //进行颜色处理

55 cout<<"Process image "<<argv[1]<<"(Size: "<<width<<"*"<<height<<", Channels: "<<channel<<"WidthStep: "<<step<<" )"<<endl;

56 for(int i=0;i<width;i++)

57 for(int j=0;j<height;j++)

58 //for(int k=0;k<=channel;k++)

59 {

60 //data[i*channel+j*step+k]=-data[i*channel+j*step+k];

61 //img2->imageData[i*channel+j*step+k]=data[i*channel+j*step+k];

62 data[i*channel+j*step+0]*=-1;

63 data[i*channel+j*step+1]*=-1;

64 data[i*channel+j*step+2]*=-1;

65

66 //测试3个通道的颜色：0 B 1 G 3 R

67 }

68 //显示图像

69 cvPolyLine(img1,cvPoint(),)

70 cvShowImage(argv[1],img1);

71 cvWaitKey(0);

72 cvSaveImage(argv[2],img2);

73 cvDestroyWindow(argv[1]);

74 cvDestroyWindow("Before Process");

75 cvReleaseImage(&img1);

76 //leaseImage(&img2);

77 cvReleaseImageHeader(&img2);

78 }

79