copyMakeBorder

copyMakeBorder(src,dst,top,bottom,left,right,borderType,value);

borderType有两种
- BORDER_CONSTANT
- BORDER_REPLICATE

#include <opencv2/imgproc/imgproc.hpp>#include <opencv2/highgui/highgui.hpp>using namespace cv;using namespace std;Mat src, dst;int top0, bottom0, left0, right0;int borderType;Scalar value;String window_name="copyMakeBorder Demo";RNG rng(12345);int main(){    Mat src=imread("image.jpg");    int c;    namedWindow(window_name,WINDOW_AUTOSIZE);    top0=(int)(0.05*src.rows);    bottom0=(int)(0.05*src.rows);    left0=(int)(0.05*src.cols);    right0=(int)(0.05*src.cols);    dst=src;    imshow(window_name,dst);    while(true)    {        c=waitKey(500);        if((char)c==27)            break;        else if((char)c=='c')            borderType=BORDER_CONSTANT;        else if((char)c=='r')            borderType=BORDER_REPLICATE;        value=Scalar(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255));        copyMakeBorder(src,dst,top0,bottom0,left0,right0,borderType,value);        imshow(window_name,dst);    }    return 0;}

实验截图

以上两张为BORDER_CONSTANT结果

以上为BORDER_REPLICATE结果