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propagated 2 fixed from 2.4 to trunk

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This commit is contained in:
Vadim Pisarevsky 2012-05-11 11:48:26 +00:00
parent 2dafc9a853
commit e794622776
2 changed files with 15 additions and 4 deletions
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2
modules/core/doc/operations_on_arrays.rst
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@ -1956,7 +1956,7 @@ The function ``mulSpectrums`` performs the per-element multiplication of the two
The function, together with
:ocv:func:`dft` and
:ocv:func:`idft` , may be used to calculate convolution (pass ``conj=false`` ) or correlation (pass ``conj=false`` ) of two arrays rapidly. When the arrays are complex, they are simply multiplied (per element) with an optional conjugation of the second-array elements. When the arrays are real, they are assumed to be CCS-packed (see
:ocv:func:`idft` , may be used to calculate convolution (pass ``conj=false`` ) or correlation (pass ``conj=true`` ) of two arrays rapidly. When the arrays are complex, they are simply multiplied (per element) with an optional conjugation of the second-array elements. When the arrays are real, they are assumed to be CCS-packed (see
:ocv:func:`dft` for details).

17
samples/cpp/facerec_demo.cpp
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@ -25,6 +25,17 @@
using namespace cv;
using namespace std;
Mat toGrayscale(InputArray _src) {
Mat src = _src.getMat();
// only allow one channel
if(src.channels() != 1)
CV_Error(CV_StsBadArg, "Only Matrices with one channel are supported");
// create and return normalized image
Mat dst;
cv::normalize(_src, dst, 0, 255, NORM_MINMAX, CV_8UC1);
return dst;
}
void read_csv(const string& filename, vector<Mat>& images, vector<int>& labels, char separator = ';') {
std::ifstream file(filename.c_str(), ifstream::in);
if (!file)
@ -79,10 +90,10 @@ int main(int argc, const char *argv[]) {
for (int i = 0; i < min(10, W.cols); i++) {
// get eigenvector #i
Mat ev = W.col(i).clone();
// reshape to original site
Mat grayscale, cgrayscale;
cvtColor(ev.reshape(1, height), grayscale, COLOR_BGR2GRAY);
// reshape to original size AND normalize between [0...255]
Mat grayscale = toGrayscale(ev.reshape(1, height));
// show image (with Jet colormap)
Mat cgrayscale;
applyColorMap(grayscale, cgrayscale, COLORMAP_JET);
imshow(format("%d", i), cgrayscale);
}