OpenCV3 之 顯式建立Mat對象的幾種方法

版權聲明：本文為部落客原創文章，遵循 CC 4.0 BY-NC-SA 版權協定，轉載請附上原文出處連結和本聲明。 本文連結： https://blog.csdn.net/weixin_43455581/article/details/100557022

指定存儲元素的資料類型以及每個矩陣點的通道數

CV_[位數][是否帶符号][類型字首]C[通道數]
           

• 1

#include<opencv2\opencv.hpp>
#include<iostream>
using namespace std;
using namespace cv;

int main() {

	// 指定存儲元素的資料類型以及每個矩陣點的通道數：
	//		CV_[位數][是否帶符号][類型字首]C[通道數]

	// 方法1：使用Mat()構造函數
	Mat M(2, 2, CV_8UC3, Scalar(0, 0, 255));
	cout << "M = " << endl << " " << M << endl << endl;
	cout << "---------------------------------------" << endl;

	// 方法2：利用create()函數
	M.create(4, 4, CV_8UC(3));
	cout << "M = " << endl << " " << M << endl << endl;
	cout << "---------------------------------------" << endl;

	
	// 方法3：采用Matlab式的初始化方式
	Mat E = Mat::eye(4, 4, CV_64F);
	cout << "E = " << endl << " " << E << endl << endl;
	cout << "---------------------------------------" << endl;

	Mat O = Mat::ones(2, 2, CV_32F);
	cout << "O = " << endl << " " << O << endl << endl;
	cout << "---------------------------------------" << endl;

	Mat Z = Mat::zeros(3, 3, CV_8UC1);
	cout << "Z = " << endl << " " << Z << endl << endl;
	cout << "---------------------------------------" << endl;

	// 方法4：對小矩陣使用逗号分隔式初始化函數
	//						分隔式順序按列從左到右
	Mat C = (Mat_<double>(3, 3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);
	cout << "C = " << endl << " " << C << endl << endl;
	cout << "---------------------------------------" << endl;

	// 方法5：為已存在的對象建立新資訊頭
	Mat RowClone = C.row(1).clone();
	cout << "RowClone = " << endl << " " << RowClone << endl << endl;
	cout << "---------------------------------------" << endl;

	// 使用randu()方法填充矩陣
	Mat r = Mat(10, 3, CV_8UC3);
	randu(r, Scalar::all(0), Scalar::all(255));
	cout << r<<endl << endl;
	cout << "------------------------------" << endl;
	
	system("pause");
}
           

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53

參考書籍《OpenCV3程式設計入門》

</div>
            <link href="https://csdnimg.cn/release/phoenix/mdeditor/markdown_views-b6c3c6d139.css" target="_blank" rel="external nofollow"  rel="stylesheet">
                </div>