Fórum Opencv com c++ Reconhecimento facial com algoritimo fisherface sempre reconhece a mesma pessoa pra todas as pessoas mesmo com imagem identica de entrada e reconstroi uma imagem preta #570331

void RecognitionAlgo::Running()
{
	// Create the cascade classifier object used for the face detection
	cv::CascadeClassifier face_cascade;
	// Use the haarcascade frontalface_alt.xml library
	if (!face_cascade.load("haarcascade_frontalface_alt.xml"))
	{
		Log("Error at face Cascade Load!")
	}
	

	// Setup image files used in the capture process
	cv::Mat captureFrame;
	cv::Mat grayscaleFrame;
	cv::Mat shrinkFrame;


	// Create a vector to store the face found
	std::vector<cv::Rect> faces;
	std::vector<cv::Mat> Preprocessed_Faces;
	std::vector<cv::string> Preprocessed_Faces_Names;
	cv::string myname;
	std::vector<int> faceLabels;

	// Init the face Recognizer
	cv::initModule_contrib();

	std::string facerecAlgorithm = "FaceRecognizer.Fisherfaces";
	cv::Ptr<cv::FaceRecognizer> model;
	// Use OpenCV's new FaceRecognizer in the "contrib" module;
	model = cv::Algorithm::create<cv::FaceRecognizer>(facerecAlgorithm);
	if (model.empty())
	{
		std::cerr << "ERROR: FaceRecognizer" << std::endl;
	}
	try
	{
		//model->load("TrainedModel.xml");
	}
	catch (const std::exception&)
	{
			
	}

	// Create a loop to caoture and find faces
	while (true)
	{
		// Capture a new image frame
		if (swCamera)
		{
			captureDevice >> captureFrame;
		}
		else
		{
			captureFrame = cv::imread("face3.PNG");
		}

		// Shrink the captured image, Convert to gray scale and equalize
		cv::cvtColor(captureFrame, grayscaleFrame, CV_BGR2GRAY);
		cv::equalizeHist(grayscaleFrame, grayscaleFrame);
		shrinkFrame = ShrinkingImage(grayscaleFrame);

		// Find faces on the shrink image (because it's faster) and store them in the vector array
		face_cascade.detectMultiScale(shrinkFrame, faces, 1.1, 4, CV_HAAR_FIND_BIGGEST_OBJECT | CV_HAAR_SCALE_IMAGE, cv::Size(30, 30));

		if (faces.size() > 0)
			faces = EnlargeResults(captureFrame, faces);

		// Draw a rectangle for all found faces in the vector array on original image
		for (int i = 0; i < faces.size(); i++)
		{
			cv::Point pt1(faces[i].x + faces[i].width, faces[i].y + faces[i].height);
			cv::Point pt2(faces[i].x, faces[i].y);
			cv::Mat theFace = grayscaleFrame(faces[i]);
			// try to treat the face by identifying the eyes, if the eyes fail to detect, it returns theface
			cv::Mat filtered = TreatmentForFace(theFace);
			// Collecting faces and learning from them.
			if (starTraining && TrainName != "")
			{
				if (colFace)
				{
					Preprocessed_Faces.push_back(filtered);
					if (myname == "")
					{
						myname = TrainName;
					}
					colFace = false;
				}
			}
			else
			{
				if (!starTraining && Preprocessed_Faces.size() > 0)
				{
					// create the person folder
					std::string command = "mkdir ";
					std::string foldercom = "TrainingFolder\\\\\\\\" + myname;
					command += foldercom;
					system(command.c_str());

					// create a string to access the recent created folder
					std::string foldername = foldercom.substr(0, foldercom.size() - (myname.size() + 1));
					foldername.append("/");
					foldername.append(myname);
					foldername.append("/");
					foldername.append(myname);
					// save the colected faces on the folder
					for (int i = 0; i < Preprocessed_Faces.size(); i++)
					{
						std::ostringstream oss;
						oss << i;
						cv::imwrite(foldername + oss.str() + ".PNG", Preprocessed_Faces[i]);
					}
					myname = "";
					Preprocessed_Faces.clear();
				}
			}
			if (traiModel)
			{
				// read all folders on the images and for each one give an number id
				// read the images for each folder and add on a vector of images
				// read the folder name and give to all images to set the label info
				Preprocessed_Faces.clear();
				faceLabels.clear();
				Preprocessed_Faces_Names.clear();

				std::string folder = "TrainingFolder\\\\\\\\";
				std::vector<cv::string> foldernames;
				foldernames = get_all_files_names_within_folder(folder);
				std::vector<int> labels;
				for (int f = 0; f < foldernames.size(); f++)
				{
					std::string thisfoldername = folder + foldernames[f];
					std::vector<cv::string> filenames;
					cv::glob(thisfoldername, filenames);
					Preprocessed_Faces_Names.push_back(foldernames[f]);
					labels.push_back(f + 1);
					for (int fn = 0; fn < filenames.size(); fn++)
					{
						Preprocessed_Faces.push_back(cv::imread(filenames[fn]));
						//std::cout << filenames[fn] << std::endl;
						faceLabels.push_back(f + 1);
					}
				}
				cv::imwrite("Traintest.PNG", Preprocessed_Faces[0]);
				std::map<int, std::string> map1;
				for (int i = 0; i < Preprocessed_Faces_Names.size(); i++)
				{
					map1.insert(std::pair<int, std::string>(labels[i], Preprocessed_Faces_Names[i]));
					std::cout << Preprocessed_Faces_Names[i] << std::endl;
				}
				model->setLabelsInfo(map1);
				model->train(Preprocessed_Faces, faceLabels);
				traiModel = false;
			}
			if (identif)
			{
				// identify the current face looking on the database
				// Prediction Validation
				// Get some required data from the FaceRecognizer model.
				cv::Mat eigenvectors = model->get<cv::Mat>("eigenvectors");
				cv::Mat averageFaceRow = model->get<cv::Mat>("mean");

				// Project the input image onto the eigenspace.
				cv::Mat projection = cv::subspaceProject(eigenvectors, averageFaceRow, filtered.reshape(1, 1));

				// Generate the reconstructed face back from the eigenspace.
				cv::Mat reconstructionRow = cv::subspaceReconstruct(eigenvectors, averageFaceRow, projection);

				// Make it a rectangular shaped image instead of a single row.
				cv::Mat reconstructionMat = reconstructionRow.reshape(1, filtered.rows);

				// Convert the floating-point pixels to regular 8-bit uchar.
				cv::Mat reconstructedFace = cv::Mat(reconstructionMat.size(), CV_8U);
				reconstructionMat.convertTo(reconstructedFace, CV_8U, 1, 0);

				cv::imwrite("Teste.PNG", filtered);
				cv::imwrite("Teste2.PNG", reconstructedFace);

				int identity = model->predict(filtered);
				double similarity = getSimilarity(filtered, reconstructedFace);
				if (similarity > .7f)
				{
					//identity = -1; // -1 means that the face is not registred in the trainer
				}
				std::cout << "This is: " << identity << " and: " << model->getLabelInfo(identity) << std::endl;
				identif = false;
			}
		}
		// Print the output
		cv::resize(captureFrame, captureFrame, cv::Size(800, 600));
		cv::imshow("outputCapture", ca