您好,登錄后才能下訂單哦!
目標(biāo):
基于OpenCV的函數(shù)cv::copyMakeBorder給圖像添加邊框
函數(shù)簡(jiǎn)介:
copyMakeBorder( src, dst, top, bottom, left, right, borderType, value );
參數(shù):
src: 原圖像
dst: 目標(biāo)圖像
top, bottom, left, right: 每一個(gè)邊界方向上像素的寬度.在這里使用圖像原始大小的 5% .
borderType:邊框的類(lèi)型 。當(dāng)前例子中位純色或者邊界的復(fù)制.
value: 如果borderType 設(shè)置位 BORDER_CONSTANT, 這個(gè)將作為邊框的顏色.
邊框的類(lèi)型
1)純色邊框
BORDER_CONSTANT,邊框設(shè)置位某種單一的顏色,比如黑色
2)圖像邊界擴(kuò)展
BORDER_REPLICATE,復(fù)制原圖的邊界進(jìn)行擴(kuò)展
代碼
/** * @file copyMakeBorder_demo.cpp * @brief Sample code that shows the functionality of copyMakeBorder * @author OpenCV team */ #include "opencv2/imgproc.hpp" #include "opencv2/imgcodecs.hpp" #include "opencv2/highgui.hpp" using namespace cv; //![variables] Mat src, dst; int top, bottom, left, right; int borderType; const char* window_name = "copyMakeBorder Demo"; RNG rng(12345); //![variables] /** * @function main */ int main( int, char** argv ) { int c; //![load] src = imread( argv[1], IMREAD_COLOR ); // Load an image if( src.empty() ) { printf(" No data entered, please enter the path to an image file \n"); return -1; } //![load] /// Brief how-to for this program printf( "\n \t copyMakeBorder Demo: \n" ); printf( "\t -------------------- \n" ); printf( " ** Press 'c' to set the border to a random constant value \n"); printf( " ** Press 'r' to set the border to be replicated \n"); printf( " ** Press 'ESC' to exit the program \n"); //![create_window] namedWindow( window_name, WINDOW_AUTOSIZE ); //![create_window] //![init_arguments] /// Initialize arguments for the filter top = (int) (0.05*src.rows); bottom = (int) (0.05*src.rows); left = (int) (0.05*src.cols); right = (int) (0.05*src.cols); //![init_arguments] dst = src; imshow( window_name, dst ); for(;;) { //![check_keypress] c = waitKey(500); if( (char)c == 27 ) { break; } else if( (char)c == 'c' ) { borderType = BORDER_CONSTANT; } else if( (char)c == 'r' ) { borderType = BORDER_REPLICATE; } //![check_keypress] //![update_value] Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) ); //![update_value] //![copymakeborder] copyMakeBorder( src, dst, top, bottom, left, right, borderType, value ); //![copymakeborder] //![display] imshow( window_name, dst ); //![display] } return 0; }
效果
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持億速云。
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀(guān)點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。