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2016-04-29 22:19:38 -0500 asked a question Help analyze 'make' error in opencv-contrib3

OS X 10.9.5 Mavericks python 2.7.11 homebrew installation opencv 3.1.0, opencv contrib3 cmake 2.5.2

build with

    -D WITH_CUDA=OFF -D CMAKE_INSTALL_PREFIX=/Users/stefan/Downloads/opencv-3.1.0dl/build \
    -D PYTHON2_LIBRARIES=/usr/local/Cellar/python/2.7.10/Frameworks/Python.framework/Versions/2.7/bin \
    -D PYTHON2_PACKAGES_PATH=~/.virtualenvs/cv/lib/python2.7/site-packages \
    -D PYTHON2_NUMPY_INCLUDE_DIRS=~/.virtualenvs/cv/lib/python2.7/site-packages/numpy/core/include \
    -D PYTHON2_INCLUDE_DIR=/usr/local/Frameworks/Python.framework/Headers \
    -D OPENCV_EXTRA_MODULES_PATH=~/Downloads/opencv_contrib-3.0.0/modules ..

make results in 46% build with error /opencv_contrib-3.0.0/modules/optflow/src/motempl.cpp:215:9: error: use of undeclared identifier 'hal' hal::fastAtan2(dY_max_row, dX_min_row, orient_row, size.width, true);

Does anyone have insight on how to proceed?

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2016-04-04 23:36:53 -0500 commented question OpenCV 3.1 x64 libs for visual studio 2015

I am having the same issue. How did you resolve it?

2016-04-04 23:35:00 -0500 asked a question Cannot find additional libraries in openCV 3.1.0

I followed the instructions on installing openCV for Windows x64 (no I did not build it, I downloaded the precompiled binary). The instructions however were for v 2.4.2 All of it was relevant but I got stuck at this page

where it talks about adding libraries to Linker ‣ General and under the “Additional Library Directories”.

I cannot find any of these:

opencv_calib3d249d.lib opencv_contrib249d.lib opencv_core249d.lib opencv_features2d249d.lib opencv_flann249d.lib opencv_gpu249d.lib opencv_highgui249d.lib opencv_imgproc249d.lib opencv_legacy249d.lib opencv_ml249d.lib opencv_nonfree249d.lib opencv_objdetect249d.lib opencv_ocl249d.lib opencv_photo249d.lib opencv_stitching249d.lib opencv_superres249d.lib opencv_ts249d.lib opencv_video249d.lib opencv_videostab249d.lib

The only two I find are opencv_world310.lib and the debug version. And I end up with linking errors at run time.

2016-04-03 14:06:03 -0500 commented question Sending rendered video stream to openCV

thanks. now I have to figure out how to address a particular monitor since I have 2!

2016-04-03 00:44:59 -0500 asked a question Sending rendered video stream to openCV

Is there a way to use the output of a video game in real time as a stream to openCV?

Although I can open saved .avi files in openCV, I would rather just pipe the video stream of the frame buffer directly to openCV. Right now I have a webcam pointed at the screen and am capturing the webcam with

cap = cv2.VideoCapture(0)