• 基础结构体

CvPoint int x,y

CvPoint2D32f Float x,y;

CvSize Int width,height

CvRect int x,y,width,height

CvScalar double val[4] 这里为RGBA的值

• CvMat

typedef struct CvMat {

    int type;

    int step;

    int* refcount;     // for internal use only

    union {

         uchar* ptr;

         short* s;

         int*    i;

         float* fl;

         double* db;

    } data;

    union {

         int rows;

         int height;

    };

    union {

         int cols;

         int width;

    };

} CvMat;

float vals[] = [1,2,3,4];

cvCreateMat(5,5, CV_32FC1);

CvInitMatHeader {

    &Mat, 2, 2, CV_32FC1, vals

}

*( (float*)CV_MAT_ELEM_PTR(*mat, 3, 2) ) = 7.7; // 赋值

cvmSet(mat, 2, 2, 0.5);

double cvGet(mat, 2,2);

• IplImage

// 对于指定区域进行色彩加强

int main(){

    char input[] = "/Users/basasuya/Downloads/1.jpg";

    IplImage* src = cvLoadImage(input);

    int x,y,width,height,add;

    scanf("%d %d %d %d %d",&x,&y,&width,&height,&add);

    cvSetImageROI(src, cvRect(x,y,width,height));

    cvAddS(src, cvScalar(add), src);

    cvResetImageROI(src);

    cvNamedWindow("Roi_Add", 1);

    cvShowImage("Roi_Add", src);

    cvWaitKey();

}

//另一种加强的方式

int main(){

    char input[] = "/Users/basasuya/Downloads/1.jpg";

    IplImage* src = cvLoadImage(input);

    int x,y,width,height,add;

    scanf("%d %d %d %d %d",&x,&y,&width,&height,&add);

  //  cvSetImageROI(src, cvRect(x,y,width,height));

    IplImage* cha = cvCreateImageHeader(cvSize(width, height), src->depth, src->nChannels);

    cha->origin = src->origin;

    cha->widthStep = src->widthStep;

    cha->imageData = src->imageData + y* src->widthStep + x* src->nChannels;

    cvAddS(cha, cvScalar(add), cha);

    cvReleaseImageHeader(&cha);

    cvNamedWindow("Roi_add", CV_WINDOW_AUTOSIZE);

    cvShowImage("Roi_add", src);

    cvWaitKey();

    return 0;

}

//将两个图片进行叠加

int main(){

    char input1[] = "/Users/basasuya/Downloads/1.jpg";

    char input2[] = "/Users/basasuya/Downloads/2.jpg";

    IplImage* s1 = cvLoadImage(input1);

    IplImage* s2 = cvLoadImage(input2);

    int x,y,width,height;

    double alpha, beta;

    scanf("%d %d %lf %lf",&x,&y,&alpha,&beta);

    width = s2->width; height = s2->height;

  //  cvSetImageROI(src, cvRect(x,y,width,height));

    cvSetImageROI(s1, cvRect(x,y,width,height));

    cvSetImageROI(s2, cvRect(0,0,width,height));

    cvAddWeighted(s1, alpha, s2, beta, 0, s1);

    cvResetImageROI(s1);

    ShowImg(s1);

    return 0;

}