void Frame::FindKeypoints(const cv::Mat& img) { std::chrono::steady_clock::time_point t1 = std::chrono::steady_clock::now(); scanimg = img; int kPcount = 0; zbar::ImageScanner scanner; scanner.set_config( zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1); Image qrimage(scanimg.cols, scanimg.rows, "Y800", scanimg.data, scanimg.cols* scanimg.rows); std::chrono::steady_clock::time_point t2 = std::chrono::steady_clock::now(); if( scanner.scan(qrimage) > 0){ for(Image::SymbolIterator symbol = qrimage.symbol_begin();symbol != qrimage.symbol_end(); ++symbol) { kPcount++; for(int k = 0; k < 4; k++)if(symbol->get_location_size()==4){ keyFeature kfeature; cv::KeyPoint kp; kp.pt.x = (float)symbol->get_location_x(k); kp.pt.y = (float)symbol->get_location_y(k); kfeature.kp = kp; kfeature.marker_id = k; kfeature.code_id = stoi(symbol->get_data()); frameKeyFeatures.push_back(kfeature); //std::cout << "locations are " << symbol->get_location_x(k) <<" "<<symbol->get_location_y(k)<<std::endl; cv::Point sympos = cv::Point( symbol->get_location_x(k), symbol->get_location_y(k)); cv::circle( scanimg, sympos, 4, cv::Scalar( 0, 0, 255 ), 3, 8 ); } std::string out = "the id of code is " + symbol->get_data(); //std::cout << out<< std::endl; //cv::imshow("123", scanimg); } std::chrono::steady_clock::time_point t3 = std::chrono::steady_clock::now(); double ttrack1 = std::chrono::duration_cast<std::chrono::microseconds>(t2 - t1).count(); double ttrack2 = std::chrono::duration_cast<std::chrono::microseconds>(t3 - t2).count(); double ttrack3 = std::chrono::duration_cast<std::chrono::microseconds>(t3 - t1).count(); //std::cout <<"ttrack1 "<< ttrack1 <<"us ttrack2 "<< ttrack2 <<"us ttrack3 is "<< ttrack3 <<"us"<< std::endl; isKeyframe = true; } }
void QrTracker::track(Mat frame, int &size_x, int &size_y, string &data, Point2f &p1, Point2f &p2, Point2f &p3, Point2f &p4) { Mat frame_grayscale; cvtColor(frame, frame_grayscale, COLOR_BGR2HSV); // wrap image int width = frame_grayscale.cols; int height = frame_grayscale.rows; uchar *raw = (uchar *)(frame_grayscale.data); Image image(width, height, "Y800", raw, width * height); //Scan the image for QRcodes scanner.scan(image); for (Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol) { //Size size_x = symbol->get_location_x(2) - symbol->get_location_x(1); size_y = symbol->get_location_y(1) - symbol->get_location_y(0); //Data data = symbol->get_data().c_str(); //Points if (symbol->get_location_size() == 4) { p1 = Point2f(symbol->get_location_x(0), symbol->get_location_y(0)); p2 = Point2f(symbol->get_location_x(1), symbol->get_location_y(1)); p3 = Point2f(symbol->get_location_x(2), symbol->get_location_y(2)); p4 = Point2f(symbol->get_location_x(3), symbol->get_location_y(3)); } else { p1 = Point2f(-1,-1); p2 = Point2f(-1,-1); p3 = Point2f(-1,-1); p4 = Point2f(-1,-1); } } }
/** * This is a (modified) test program written by Michael Young * (https://github.com/ayoungprogrammer/WebcamCodeScanner). It was modified to * work with the Raspicam. */ int main(int argc, char* argv[]) { PiCamera cam; // open the video camera no. 0 ImageScanner scanner; scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1); namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo" while (1) { Mat frame = cam.Snap(); Mat grey; cvtColor(frame,grey,CV_BGR2GRAY); int width = frame.cols; int height = frame.rows; uchar *raw = (uchar *)grey.data; // wrap image data zbar::Image image(width, height, "Y800", raw, width * height); // scan the image for barcodes int n = scanner.scan(image); // extract results for(Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol) { vector<Point> vp; // do something useful with results cout << "decoded " << symbol->get_type_name() << " symbol \"" << symbol->get_data() << '"' <<" "<< endl; int n = symbol->get_location_size(); for(int i=0;i<n;i++){ vp.push_back(Point(symbol->get_location_x(i),symbol->get_location_y(i))); } RotatedRect r = minAreaRect(vp); Point2f pts[4]; r.points(pts); for(int i=0;i<4;i++){ line(frame,pts[i],pts[(i+1)%4],Scalar(255,0,0),3); } } imshow("MyVideo", frame); //show the frame in "MyVideo" window if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop { cout << "esc key is pressed by user" << endl; break; } } return 0; }
int main(int argc, char **argv) { int cam_idx = 0; if (argc == 2) { cam_idx = atoi(argv[1]); } VideoCapture cap(cam_idx); if (!cap.isOpened()) { cerr << "Could not open camera." << endl; exit(EXIT_FAILURE); } //cap.set(CV_CAP_PROP_FRAME_WIDTH, 640); //cap.set(CV_CAP_PROP_FRAME_HEIGHT, 480); namedWindow("captured", CV_WINDOW_AUTOSIZE); // Create a zbar reader ImageScanner scanner; // Configure the reader scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1); for (;;) { // Capture an OpenCV frame cv::Mat frame, frame_grayscale; cap >> frame; // Convert to grayscale cvtColor(frame, frame_grayscale, CV_BGR2GRAY); // Obtain image data int width = frame_grayscale.cols; int height = frame_grayscale.rows; uchar *raw = (uchar *)(frame_grayscale.data); // Wrap image data Image image(width, height, "Y800", raw, width * height); // Scan the image for barcodes //int n = scanner.scan(image); scanner.scan(image); // Extract results int counter = 0; for (Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol) { time_t now; tm *current; now = time(0); current = localtime(&now); // do something useful with results cout << "[" << current->tm_hour << ":" << current->tm_min << ":" << setw(2) << setfill('0') << current->tm_sec << "] " << counter << " " << "decoded " << symbol->get_type_name() << " symbol \"" << symbol->get_data() << '"' << endl; //cout << "Location: (" << symbol->get_location_x(0) << "," << symbol->get_location_y(0) << ")" << endl; //cout << "Size: " << symbol->get_location_size() << endl; // Draw location of the symbols found if (symbol->get_location_size() == 4) { //rectangle(frame, Rect(symbol->get_location_x(i), symbol->get_location_y(i), 10, 10), Scalar(0, 255, 0)); line(frame, Point(symbol->get_location_x(0), symbol->get_location_y(0)), Point(symbol->get_location_x(1), symbol->get_location_y(1)), Scalar(0, 255, 0), 2, 8, 0); line(frame, Point(symbol->get_location_x(1), symbol->get_location_y(1)), Point(symbol->get_location_x(2), symbol->get_location_y(2)), Scalar(0, 255, 0), 2, 8, 0); line(frame, Point(symbol->get_location_x(2), symbol->get_location_y(2)), Point(symbol->get_location_x(3), symbol->get_location_y(3)), Scalar(0, 255, 0), 2, 8, 0); line(frame, Point(symbol->get_location_x(3), symbol->get_location_y(3)), Point(symbol->get_location_x(0), symbol->get_location_y(0)), Scalar(0, 255, 0), 2, 8, 0); } // Get points /*for (Symbol::PointIterator point = symbol.point_begin(); point != symbol.point_end(); ++point) { cout << point << endl; } */ counter++; } // Show captured frame, now with overlays! imshow("captured", frame); // clean up image.set_data(NULL, 0); waitKey(30); } return 0; }
JNIEXPORT void JNICALL Java_com_example_qr_MainActivity_nativeDetect( JNIEnv * jenv, jclass, jlong imageGray) { LOGD( "Java_org_opencv_samples_facedetect_DetectionBasedTracker_nativeDetect enter"); try { vector<Rect> RectFaces; // ((DetectionBasedTracker*)thiz)->process(*((Mat*)imageGray)); // ((DetectionBasedTracker*)thiz)->getObjects(RectFaces); // vector_Rect_to_Mat(RectFaces, *((Mat*)faces)); Mat img = *((Mat*) imageGray); Mat imgout; cvtColor(img, imgout, CV_GRAY2RGB); int width = img.cols; int height = img.rows; uchar *raw = (uchar *) img.data; // uchar *raw = (uchar *) imageGray; // wrap image data Image image(width, height, "Y800", raw, width * height); // scan the image for barcodes ImageScanner scanner; scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1); int n = scanner.scan(image); // extract results for (Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol) { vector<Point> vp; // do something useful with results cout << "decoded " << symbol->get_type_name() << " symbol \"" << symbol->get_data() << '"' << " " << endl; int n = symbol->get_location_size(); for (int i = 0; i < n; i++) { vp.push_back( Point(symbol->get_location_x(i), symbol->get_location_y(i))); } RotatedRect r = minAreaRect(vp); Point2f pts[4]; r.points(pts); for (int i = 0; i < 4; i++) { line(imgout, pts[i], pts[(i + 1) % 4], Scalar(255, 0, 0), 3); } cout << "Angle: " << r.angle << endl; } imshow("imgout.jpg", imgout); // clean up image.set_data(NULL, 0); waitKey(); } catch (cv::Exception& e) { LOGD("nativeCreateObject caught cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if (!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeDetect caught unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code DetectionBasedTracker.nativeDetect()"); } LOGD( "Java_org_opencv_samples_facedetect_DetectionBasedTracker_nativeDetect exit"); }