保存单张图片¶
按 “Space” “s” “S” 键来保存图片。
参考代码片段:
api->Start(Source::VIDEO_STREAMING);
cv::namedWindow("frame");
std::int32_t count = 0;
std::cout << "Press 'Space' 's' 'S' to save image." << std::endl;
while (true) {
api->WaitForStreams();
auto &&left_data = api->GetStreamData(Stream::LEFT);
auto &&right_data = api->GetStreamData(Stream::RIGHT);
if (!left_data.frame.empty() && !right_data.frame.empty()) {
cv::Mat img;
cv::hconcat(left_data.frame, right_data.frame, img);
cv::imshow("frame", img);
}
char key = static_cast<char>(cv::waitKey(1));
if (key == 27 || key == 'q' || key == 'Q') { // ESC/Q
break;
} else if (key == 32 || key == 's' || key == 'S') {
if (!left_data.frame.empty() && !right_data.frame.empty()) {
char l_name[20];
char r_name[20];
++count;
snprintf(l_name, sizeof(l_name), "left_%d.jpg", count);
snprintf(r_name, sizeof(r_name), "right_%d.jpg", count);
cv::imwrite(l_name, left_data.frame);
cv::imwrite(r_name, right_data.frame);
std::cout << "Saved " << l_name << " " << r_name << " to current directory" << std::endl;
}
}
}
api->Stop(Source::VIDEO_STREAMING);
上述代码,用了 OpenCV 来显示图像。选中显示窗口时,按 ESC/Q
就会结束程序。
完整代码样例,请见 save_single_image.cc .