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2016-08-12 03:37:02 -0600	commented question	Assertion failed on picture size (31 px, #), cv2.canny in opencv 3.1 @berak I have already contact with alalek. I'll make a complete new installation on weekend and report my steps.
2016-08-09 09:35:13 -0600	received badge	● Editor (source)
2016-08-08 12:43:20 -0600	asked a question	Assertion failed on picture size (31 px, #), cv2.canny in opencv 3.1 System: opencv 3.1 mint 17.2 python 2.7.6 pycharm 2016.2 prof ipython 5.0 Error message taken from ipython: OpenCV Error: Assertion failed (0 <= _rowRange.start && _rowRange.start <= _rowRange.end && _rowRange.end <= m.rows) in Mat, file /home/georg/ocv31/modules/core/src/matrix.cpp, line 477 terminate called after throwing an instance of 'cv::Exception' what(): /home/georg/ocv31/modules/core/src/matrix.cpp:477: error: (-215) 0 <= _rowRange.start && _rowRange.start <= _rowRange.end && _rowRange.end <= m.rows in function Mat Warning: Program '/usr/local/bin/ipython' crashed. In [1]: import cv2 In [2]: import numpy as np In [3]: a = np.zeros((31,20), np.uint8) In [4]: b = cv2.Canny(a, 60, 300, L2gradient=True) After this lines, ipython crashes with the messages above. It will not crash after setting L2gradient to False, or if changing the shape (e.g. 30,20). The same happens with pycharm. I have not had this message with opencv 3.0. Can somebody help me? 09.08.2016: Now I have installed ocv 2.4.13. Everything is working well. BTW: The Message Corrupt JPEG data: 2 extraneous bytes before marker 0x# during reading the video frames, is also disappeared (Logitech c270).
2016-08-08 11:56:37 -0600	answered a question	How to use Opencv 3 particle filter api System: opencv 3.1 python 2.7.6 pycharm 2016.2 prof ipython 5.0 Error message taken from ipython: OpenCV Error: Assertion failed (0 <= _rowRange.start && _rowRange.start <= _rowRange.end && _rowRange.end <= m.rows) in Mat, file /home/georg/ocv31/modules/core/src/matrix.cpp, line 477 terminate called after throwing an instance of 'cv::Exception' what(): /home/georg/ocv31/modules/core/src/matrix.cpp:477: error: (-215) 0 <= _rowRange.start && _rowRange.start <= _rowRange.end && _rowRange.end <= m.rows in function Mat Warning: Program '/usr/local/bin/ipython' crashed. In [1]: import cv2 In [2]: import numpy as np In [3]: a = np.zeros((31,20), np.uint8) In [4]: b = cv2.Canny(a, 60, 300, L2gradient=True) After this lines, ipython crashed with the messages above. It will not crash after setting L2gradient to False, or if changing the shape (e.g. 30,20). The same happens with pycharm. I have not had this message with opencv 3.0.