williamluisan's profile - activity

I have a project using openCV which involves CascadeClassifier::detectMultiScale and FaceRecognizer .

Is it affected the FPS of my webcam when CascadeClassifier::detectMultiScale and FaceRecognizer are executed ?

I'm using eigenface FaceRecognizer for face recognition and lbp_cascade.xml for face detection,
and my webcam specification is 1280 x 720 HD @ 30 FPS, but when i try to calculate with code the grabbed frames in second, the output says it is just 9 frames/second (FPS). I use cvCaptureFromCAM(int device) and cvQueryFrame(CvCapture* capture) methods for grab the frame from video stream.

I have a project using openCV which involves CascadeClassifier::detectMultiScale and FaceRecognizer .

Is it affected the FPS of my webcam when CascadeClassifier::detectMultiScale and FaceRecognizer are executed ?

I'm using eigenface FaceRecognizer for face recognition and lbp_cascade.xml for face detection,
and my webcam specification is 1280 x 720 HD @ 30 FPS, but when i try to calculate with code the grabbed frames in second, the output says it is just 9 frames/second (FPS). I use cvCaptureFromCAM(int device) and cvQueryFrame(CvCapture* capture) methods for grab the frame from video stream.

I have a project using openCV which involves CascadeClassifier::detectMultiScale and FaceRecognizer .

Is it affected the FPS of my webcam when CascadeClassifier::detectMultiScale and FaceRecognizer are executed ?

I'm using eigenface FaceRecognizer for face recognition and lbp_cascade.xml for face detection,
and my webcam specification is 1280 x 720 HD @ 30 FPS, but when i try to calculate with code the grabbed frames in second, the output says it is just 9 frames/second (FPS). I use cvCaptureFromCAM(int device) and cvQueryFrame(CvCapture* capture) methods for grab the frame from video stream.

I have a project using openCV which involves CascadeClassifier::detectMultiScale and FaceRecognizer .

Is it affected the FPS of my webcam when CascadeClassifier::detectMultiScale and FaceRecognizer are executed ?

I'm using eigenface FaceRecognizer for face recognition and lbp_cascade.xml for face detection,
and my webcam specification is 1280 x 720 HD @ 30 FPS, but when i try to calculate with code the grabbed frames in second, the output says it is just 9 frames/second (FPS). I use cvCaptureFromCAM(int device) and cvQueryFrame(CvCapture* capture) methods for grab the frame from video stream.

Thank you for your answer Mr. Berak. It helping me so much (y) !

Hello guys, i'm a newbie in computer vision, i want to ask a question about why

Sometimes you run into the situation, when you want to apply a threshold on the prediction

? what is this threshold for ?. I'hv been read this explanation at http://docs.opencv.org/2.4/modules/co... "Setting the threshold", and it didn't explain why somtimes we need to setting the threshold for prediction. Since i know, thresholding is a method that create a binary image from grayscale image, why this threshold can determine whether a input face belongs to the training set or it is an unknown face?

Sorry for my bad english and my dumb question perhaps :D. Big regards.

thank u for your answer Mr. Berak. It's helping me so much. Regards (y)

Hello guys, i'm a newbie in OpenCV and now i'm making a project about Face Recognition with Eigenface algorithm. I got confused about what value are stored in .xml file when i use

faceRecognizer = createEigenFaceRecognizer();
faceRecognizer->train(faceData, faceLabels);
faceRecognizer->save("file_eigenfaces.xml");

is it the eigenfaces values (eigenvectors, eigenvalues, mean) stored in "file_eigenfaces.xml" ?

I'hv been read the explanation about FaceRecognizer::save at OpenCV docs (sorry, can't embed that link) but it doesn't answer my question, because it explain that it "saves a FaceRecognizer and its model state". What is that mean ?.

Thank you in advance for read my question, hope somebody can help me to understand this, sorry for newbie and bad english :D . Regards, William