t3rb3d's profile - activity

I tried this from the sample code: (*buffer).push(cv::Mat(tmp.size(), tmp.type())); tmp.copyTo((*buffer).back()

How to free cv::Mat from memory I have a sequence of images (frames) from a camera as an input, what is stored in std::q

Memory leak with opencv Mat and std::queue The camera records frames which is stored in a std::queue<cv::Mat> buff

@berak For example this: cv::Mat current_frame(500, 500, CV_16UC3); std::queue<cv::Mat> buffer; while(true) {

@berak For example this: cv::Mat current_frame(500, 500, CV_16UC3); std::queue<cv::Mat> buffer; while(true) {

For example this: cv::Mat current_frame(500, 500, CV_16UC3); std::queue<cv::Mat> buffer; while(true) { buffer

Memory leak with opencv Mat and std::queue The camera records frames which is stored in a std::queue<cv::Mat> buff

I think if you use this flag, the output is just the real part of the fft. The output is the same length, but there is n

Shift OpenCV matrix elements, extend and overlap add I am working on a real-time system, for that I have to store and pr

Yes, and also cv::dft(y, fd, cv::DFT_REAL_OUTPUT); yields 0:Fs/2 Hz range, where Fs is the sampling rate!

Yes, the plot is not an existing function, only denotes that if I plot them in some way . Since than I figured it out, a

Signal in frequency domain with OpenCV dft I am experimenting with cv::dft: a 1HZ sinus signal is generated, and display

Signal in frequency domain with OpenCV dft I am experimenting with cv::dft: a 1HZ sinus signal is generated, and display

Signal in frequency domain with OpenCV dft I am experimenting with cv::dft: a 1HZ sinus signal is generated, and try to

Signal in frequency domain with OpenCV dft I am experimenting with cv::dft: a 1HZ sinus signal generated, and try to dis

Signal in frequency domain with OpenCV dft I am experimenting with cv::dft: a 1HZ sinus signal generated, and try to dis

There is nothing between them. Copied exactly as it is. But I suspect that something goes wrong later on the code than!

Simple Array Operations I do simple array operations: adding a scalar and element-wise division of two array. The code i

Thank you for your reply! It is a useful information that the flags should be given with the 'or' operator. I didn't kno

I try to do some Fourier analysis, but in the OpenCV cv::dft function the cv::DFT_COMPLEX_OUTPUT seems not working. I do the following:

// Calculate Fourier transform for each time signal
cv::Mat hf, hf_raw, h, h_raw;
cv::Mat Fp(Pt.size[0], Pt.size[1], CV_64FC2);
cv::Mat Fz(Pt.size[0], Pt.size[1], CV_64FC2);

cv::dft(Pt.t(), Fp, cv::DFT_ROWS, cv::DFT_COMPLEX_OUTPUT);
cv::dft(Zt.t(), Fz, cv::DFT_ROWS, cv::DFT_COMPLEX_OUTPUT);



// [DEBUG]
// Fp and Fz has to be (K*4 x WINDOW_LENGTH) size in the current case (24 x 256)
std::cout << "Fp.size: " << Fp.size << std::endl;
// -> OK
// Fp elements should be complx
std::cout << "Fp.type(): " << Fp.type() << std::endl;
// -> Lots of zero at the end!!! -> With cv::DFT_REAL_OUTPUT there are no zeros



cv::Mat nom, denom, W;
cv::mulSpectrums(Fp, Fp, nom, cv::DFT_ROWS, true);
cv::mulSpectrums(Fz, Fz, denom, cv::DFT_ROWS, true);

I declare Fp and Fz to be two channeled in order to hold the real and complex values (on which the cv::mulSpectrums function can operate). But Fp.type() results in 6 which means the type of the output matrix is CV_64FC1.

OpenCV Fourier Transform complex output issue I try to do some Fourier analysis, but in the OpenCV cv::dft function the