opencv之影象的載入、顯示和儲存
阿新 • • 發佈:2021-06-27
目錄
簡介
- 載入影象: cv::imread()
- 建立影象視窗: cv::namedWindow()
- 顯示影象:cv::imshow()
- 儲存影象:cv::imwrite()
測試程式碼
#include <opencv2/opencv.hpp> //總的標頭檔案 // #include <opencv2/core.hpp> // #include <opencv2/imgcodecs.hpp> // #include <opencv2/highgui.hpp> #include <iostream> #include <string> int main(int argc, char** argv) { std::string image_name = "/home/liuzhiyang/test/color_image.png"; cv::Mat color_image; color_image = cv::imread(image_name, cv::IMREAD_COLOR); if (color_image.empty()) { std::cout << "fail to read image!" << std::endl; return 0; } cv::namedWindow("color_image"); cv::namedWindow("gray_image"); cv::Mat gray_image; cv::cvtColor(color_image, gray_image, cv::COLOR_BGR2GRAY); cv::imshow("color_image", color_image); cv::imshow("gray_image", gray_image); cv::waitKey(0); cv::imwrite("/home/liuzhiyang/test/gray_image.png", gray_image); return 0; }
注: 讀取灰色影象
cv::imread(filename, IMREAD_GRAYSCALE);