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2018-06-12 00:12:32 -0600	received badge	● Famous Question (source)
2015-11-15 09:47:07 -0600	received badge	● Notable Question (source)
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2013-03-04 06:55:49 -0600	commented answer	Android counting white pixels in binary Mat. That was exactly it. Thank you very much!
2013-03-04 06:55:06 -0600	received badge	● Scholar (source)
2013-03-03 21:57:57 -0600	received badge	● Student (source)
2013-03-03 13:20:42 -0600	commented question	OpenCV JavaCameraView is not full screen Take a look at the color blob detection sample, it is full screen. I haven't checked out much of it, I just recall that being a difference between the HelloWorld and that sample. Sorry I can't help more.
2013-03-02 20:58:02 -0600	commented question	Android counting white pixels in binary Mat. Thank you for the suggestion, but that doesn't appear to be it. Cheers :-)
2013-03-02 11:32:53 -0600	received badge	● Editor (source)
2013-03-02 11:32:19 -0600	asked a question	Android counting white pixels in binary Mat. I'm trying to count all non-black pixels in an ROI. Clearly I'm doing something wrong as it causes an exception when I try to use it. `rect = new Rect(touchX-100, touchY-100, 200, 200); Mat roi = grayMat.submat(rect); Imgproc.threshold(roi, roi, 240, 255, Imgproc.THRESH_BINARY); if (Core.countNonZero(roi) > 0){ ... }` The countNonZero throws the exception OpenCV Error: Assertion failed (src.channels() == 1 && func != 0) in int cv::countNonZero(cv::InputArray), file /home/reports/ci/slave/50-SDK/opencv/modules/core/src/stat.cpp, line 496 I'm too dumb to interpret the exception :P. I've taken a few different stabs at it and figured I'd just ask.