OpenCV >> C/C++
modify pixels(gray)
參考資訊:
1. Mat
2. modify-pixel-value
prototype
_Tp & at( int row, int col);
main.cpp
#include <stdio.h> #include <opencv2/opencv.hpp> using namespace cv; int main(int argc, char** argv) { Mat image; image = imread("main.jpg", 0); if(!image.data){ printf("No image data \n"); return -1; } for(int y=0; y<50; y++){ for(int x=0; x<100; x++){ image.at<uchar>(y, x) = 255; } } namedWindow("show image", WINDOW_AUTOSIZE); imshow("show image", image); waitKey(0); return 0; }
CMakeLists.txt
cmake_minimum_required(VERSION 2.8) project(main) find_package(OpenCV REQUIRED) include_directories(${OpenCV_INCLUDE_DIRS}) add_executable(main main.cpp) target_link_libraries(main ${OpenCV_LIBS})
編譯並且執行
$ cmake . $ make $ ./main
完成