samples/cpp/tutorial_code/ImgTrans/copyMakeBorder_demo.cpp

使用 copyMakeBorder 函数的示例。查看相应的教程了解更多详情

 
#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
 
using namespace cv;
 
// 声明变量
Mat src, dst;
int top, bottom, left, right;
int borderType = BORDER_CONSTANT;
const char* window_name = "copyMakeBorder Demo";
RNG rng(12345);
 
int main( int argc, char** argv )
{
    const char* imageName = argc >=2 ? argv[1] : "lena.jpg";
 
    // 加载图像
src = imread( samples::findFile( imageName ), IMREAD_COLOR ); // 加载图像
 
    // 检查图像是否加载成功
    if( src.empty()) {
printf(" 打开图像时出错\n");
printf(" 程序参数: [image_name -- 默认 lena.jpg] \n");
        return -1;
    }
 
    // 本程序的简要说明
printf( "\n \t copyMakeBorder 演示: \n" );
printf( "\t -------------------- \n" );
printf( " ** 按 'c' 将边框设置为随机常数值 \n");
printf( " ** 按 'r' 将边框设置为复制 \n");
printf( " ** 按 'ESC' 退出程序 \n");
 
namedWindow( window_name, WINDOW_AUTOSIZE );
 
    // 初始化滤波器的参数
top = (int) (0.05*src.rows); bottom = top;
left = (int) (0.05*src.cols); right = left;
 
    for(;;)
    {
        Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) );
 
copyMakeBorder( src, dst, top, bottom, left, right, borderType, value );
 
imshow( window_name, dst );
 
        char c = (char)waitKey(500);
        if( c == 27 )
{ break; }
        else if( c == 'c' )
{ borderType = BORDER_CONSTANT; }
        else if( c == 'r' )
{ borderType = BORDER_REPLICATE; }
    }
 
    return 0;
}