opencv--把cv::Mat数据转为二进制数据的保存和读取

保存

#include <opencv2/opencv.hpp>
#include <iostream>
#include <fstream>void saveMatToBinary(const cv::Mat& mat, const std::string& filename) {std::ofstream ofs(filename, std::ios::binary);if (!ofs.is_open()) {std::cerr << "Failed to open file for writing: " << filename << std::endl;return;}// Write the matrix type and sizeint type = mat.type();int rows = mat.rows;int cols = mat.cols;ofs.write((char*)&type, sizeof(type));ofs.write((char*)&rows, sizeof(rows));ofs.write((char*)&cols, sizeof(cols));// Write the matrix dataofs.write((char*)mat.data, mat.total() * mat.elemSize());ofs.close();
}int main() {cv::Mat image = cv::imread("path_to_your_image.jpg");if (image.empty()) {std::cerr << "Failed to load image" << std::endl;return -1;}saveMatToBinary(image, "output.bin");return 0;
}

读取

#include <opencv2/opencv.hpp>
#include <iostream>
#include <fstream>cv::Mat loadMatFromBinary(const std::string& filename) {std::ifstream ifs(filename, std::ios::binary);if (!ifs.is_open()) {std::cerr << "Failed to open file for reading: " << filename << std::endl;return cv::Mat();}// Read the matrix type and sizeint type, rows, cols;ifs.read((char*)&type, sizeof(type));ifs.read((char*)&rows, sizeof(rows));ifs.read((char*)&cols, sizeof(cols));// Create the matrixcv::Mat mat(rows, cols, type);// Read the matrix dataifs.read((char*)mat.data, mat.total() * mat.elemSize());ifs.close();return mat;
}int main() {cv::Mat loadedImage = loadMatFromBinary("output.bin");if (loadedImage.empty()) {std::cerr << "Failed to load image from binary file" << std::endl;return -1;}cv::imshow("Loaded Image", loadedImage);cv::waitKey(0);return 0;
}