Face Recognition in Video using OpenCV gives unhandled exception
I am trying to use the Face Recognition in video sample provided with OpenCV. The only modification I've done is: Instead of using command line arguments to provide CSV and Cascade classifier paths, I have given them directly in the code. This is the code:
#include "stdafx.h" #include "opencv2/core/core.hpp" #include "opencv2/contrib/contrib.hpp" #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/objdetect/objdetect.hpp" #include <iostream> #include <fstream> #include <sstream> using namespace cv; using namespace std; static void read_csv(const string& filename, vector<Mat>& images, vector<int>& labels, char separator = ';') { std::ifstream file(filename.c_str(), ifstream::in); if (!file) { string error_message = "No valid input file was given, please check the given filename."; CV_Error(CV_StsBadArg, error_message); } string line, path, classlabel; while (getline(file, line)) { stringstream liness(line); getline(liness, path, separator); getline(liness, classlabel); if(!path.empty() && !classlabel.empty()) { images.push_back(imread(path, 0)); labels.push_back(atoi(classlabel.c_str())); } } } int main(int argc, const char *argv[]) { // Check for valid command line arguments, print usage // if no arguments were given. if (argc != 4) { cout << "usage: " << argv[0] << " </path/to/haar_cascade> </path/to/csv.ext> </path/to/device id>" << endl; cout << "\t </path/to/haar_cascade> -- Path to the Haar Cascade for face detection." << endl; cout << "\t </path/to/csv.ext> -- Path to the CSV file with the face database." << endl; cout << "\t <device id> -- The webcam device id to grab frames from." << endl; //exit(1); } // Get the path to your CSV: string fn_haar = "C:\\OpenCV-2.4.2\\opencv\\data\\haarcascades\\haarcascade_frontalface_default.xml"; string fn_csv = "C:\\Users\\gaspl\\Desktop\\train.txt"; int deviceId = 1; // These vectors hold the images and corresponding labels: vector<Mat> images; vector<int> labels; // Read in the data (fails if no valid input filename is given, but you'll get an error message): try { read_csv(fn_csv, images, labels); } catch (cv::Exception& e) { cerr << "Error opening file \"" << fn_csv << "\". Reason: " << e.msg << endl; // nothing more we can do exit(1); } // Get the height from the first image. We'll need this // later in code to reshape the images to their original // size AND we need to reshape incoming faces to this size: int im_width = images[0].cols; int im_height = images[0].rows; // Create a FaceRecognizer and train it on the given images: Ptr<FaceRecognizer> model = createFisherFaceRecognizer(); model->train(images, labels); // That's it for learning the Face Recognition model. You now // need to create the classifier for the task of Face Detection. // We are going to use the haar cascade you have specified in the // command line arguments: // CascadeClassifier haar_cascade; haar_cascade.load(fn_haar); // Get a handle to the Video device: VideoCapture cap(deviceId); // Check if we can use this device at all: if(!cap.isOpened()) { cerr << "Capture Device ID " << deviceId << "cannot be opened." << endl; return -1; } // Holds the current frame from the Video device: Mat frame; for(;;) { cap >> frame; // Clone the current frame: Mat original = frame.clone(); // Convert the current frame to grayscale: Mat gray; cvtColor(original, gray, CV_BGR2GRAY); // Find the faces ...
Silly question... What exactly do you type into the command line to run this program? When I run facerec_video.exe <C:\Users\Name\Documents\facerec\haarcascade_frontalface_default.xml> <C:\Users\Name\Documents\facerec\traing.csv> <1> I get "< was unexpected at this time" is it becuase i moved the xml file to a new folder? Thanks