OpenCV && C++ 02 - Create a Blank Image & Display

Code

/* 作者：郑大峰 时间：2019年09月20日 环境：OpenCV 4.1.1 + VS2017 内容：Create a Blank Image & Display */ #include "pch.h" #include <iostream> #include <opencv2/opencv.hpp> using namespace std; using namespace cv; int main() { // Create a new image which consists of // 800 x 600 of resolution (800 wide and 600 high) // image depth of 8 bits & 3 channels // each pixels initialized to the value of (100, 250, 30) for Blue, Green and Red planes respectively Mat image(600, 800, CV_8UC3, Scalar(100, 250, 30)); String windowName = "Window with Blank Image"; namedWindow(windowName); imshow(windowName, image); waitKey(0); destroyWindow(windowName); return 0; }

Result

Explanation

Mat::Mat(int rows, int cols, int type, const Scalar& s)

This constructor will create a Mat object with specified number of rows and number of cols and initialize each element with the value given in s.

@param rows Number of rows in a 2D array. @param cols Number of columns in a 2D array. @param type Array type. Use CV_8UC1, ..., CV_64FC4 to create 1-4 channel matrices, or CV_8UC(n), ..., CV_64FC(n) to create multi-channel (up to CV_CN_MAX channels) matrices. @param s An optional value to initialize each matrix element with. To set all the matrix elements to the particular value after the construction, use the assignment operator Mat::operator=(const Scalar& value) .

转载于:https://www.cnblogs.com/zdfffg/p/11557734.html

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