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Is this normal, that when i build pyramid with level = 4, function creates vector <mat> with size = 8? It's sample code.

cv::buildOpticalFlowPyramid(queryImage, mQueryData->mPyr, cv::Size(15, 15), 3);

Here size of each mat

D/CMarkerlessRecognitionStrategy(32362): size: 432 240

D/CMarkerlessRecognitionStrategy(32362): size: 216 120

D/CMarkerlessRecognitionStrategy(32362): size: 108 60

D/CMarkerlessRecognitionStrategy(32362): size: 54 30

Is this normal, that when i build pyramid with level = 4, function creates vector <mat> with size = 8? 8?

It's sample code.

cv::buildOpticalFlowPyramid(queryImage, mQueryData->mPyr, cv::Size(15, 15), 3);

Here size of each mat

D/CMarkerlessRecognitionStrategy(32362): size: 432 240

D/CMarkerlessRecognitionStrategy(32362): size: 216 120

D/CMarkerlessRecognitionStrategy(32362): size: 108 60

D/CMarkerlessRecognitionStrategy(32362): size: 54 30