Plotting error: assertion failed

[hyperknot]

When enabling plotting, the following error is happening:

bpm plot enabled

OpenCV Error: Assertion failed (mat.isContinuous()) in unknown function, file ..
\..\..\opencv-2.4.4\modules\core\src\opengl_interop.cpp, line 1153
Traceback (most recent call last):
  File "get_pulse.py", line 127, in <module>
App.main_loop()
  File "get_pulse.py", line 122, in main_loop
self.key_handler()
  File "get_pulse.py", line 94, in key_handler
self.key_controls[key]()
  File "get_pulse.py", line 64, in toggle_display_plot
self.make_bpm_plot()
  File "get_pulse.py", line 80, in make_bpm_plot
bg = self.processor.grab_faces.slices[0])
  File "e:\docs\test\webcam-pulse-detector-master\lib\interface.py", line 113, i
n plotXY
cv2.imshow(name,z)
cv2.error: ..\..\..\opencv-2.4.4\modules\core\src\opengl_interop.cpp:1153: error
: (-215) mat.isContinuous()

I have Windows, Python 2.7, OpenCV 2.4.4 and OpenMDAO 0.5.5 and the 'S' part works perfectly.

[thearn]

Hmm, OpenCV is very picky when it comes to data formatting sometimes, and the errors that different builds give are difficult to replicate across platforms.

Just before line 113 of lib/interface.py (the last line), try explicitly casting z to a numpy array first:

z = np.array(z)

and see if that helps. Odd as it may sound,that fixed a few bugs that came up for me in a few places.

[mlequeux]

Same probleme here, the fix didn't work

OpenCV Error: Assertion failed (p.checkVector(2, CV_32S) >= 0) in polylines

P is :

[[ 10 18] [ 78 61] [148 70] [216 52] [287 26] [315 32] [350 33] [381 35] [412 39] [445 35] [478 25] [503 26] [535 22] [565 14] [595 12] [630 10]] [[ 10 150] [ 98 116] [187 98] [275 90] [364 90] [452 97] [541 115] [630 147]] [[ 10 170] [630 230]]

[Feighery]

Similar issue....

bpm plot enabled OpenCV Error: Assertion failed (p.checkVector(2, CV_32S) >= 0) in polylines, file /build/buildd/opencv-2.3.1/modules/core/src/drawing.cpp, line 2064 Traceback (most recent call last): File "get_pulse.py", line 127, in App.main_loop() File "get_pulse.py", line 122, in main_loop self.key_handler() File "get_pulse.py", line 94, in key_handler self.key_controlskey File "get_pulse.py", line 64, in toggle_display_plot self.make_bpm_plot() File "get_pulse.py", line 80, in make_bpm_plot bg = self.processor.grab_faces.slices[0]) File "/home/tomtom/Downloads/webcam-pulse-detector/lib/interface.py", line 112, in plotXY cv2.polylines(z, P, False, (255,255,255),1) cv2.error: /build/buildd/opencv-2.3.1/modules/core/src/drawing.cpp:2064: error: (-215) p.checkVector(2, CV_32S) >= 0 in function polylines

Python 2.7.3, libCV2.3, openMdao 0.5.5 and s part also works.

[thearn]

I just added a quick check of cv's polylines's function in test_webcam.py, since it seems to be tricky for a few people.

What happens when you run that?

[mlequeux]

for me, it's only when i press the key 'D' in the get_pulse.py

[thearn]

Update: I changed part of how it is used in interface.py, but since I can't seem to replicate the error I'm not sure if that will fix it

[ghost]

Same issue, I've just pulled.

VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument face detection lock = True bpm plot enabled OpenCV Error: Assertion failed (p.checkVector(2, CV_32S) >= 0) in polylines, file /build/buildd/opencv-2.3.1/modules/core/src/drawing.cpp, line 2064 Traceback (most recent call last): File "get_pulse.py", line 127, in App.main_loop() File "get_pulse.py", line 122, in main_loop self.key_handler() File "get_pulse.py", line 94, in key_handler self.key_controlskey File "get_pulse.py", line 64, in toggle_display_plot self.make_bpm_plot() File "get_pulse.py", line 80, in make_bpm_plot bg = self.processor.grab_faces.slices[0]) File "/home/flacoste/homework/webcam-pulse-detector/openmdao-0.5.5/webcam-pulse-detector/lib/interface.py", line 112, in plotXY cv2.polylines(z, [p], False, (255,255,255),1) cv2.error: /build/buildd/opencv-2.3.1/modules/core/src/drawing.cpp:2064: error: (-215) p.checkVector(2, CV_32S) >= 0 in function polylines

[ghost]

Re-pulled - I've seen that you modified test_webcam.py. Here's the error I have with it now.

python test_webcam.py VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument OpenCV Error: Assertion failed (p.checkVector(2, CV_32S) >= 0) in polylines, file /build/buildd/opencv-2.3.1/modules/core/src/drawing.cpp, line 2064 Traceback (most recent call last): File "test_webcam.py", line 15, in cv2.polylines(img, [pts1, pts2], False, (255,255,255),1) cv2.error: /build/buildd/opencv-2.3.1/modules/core/src/drawing.cpp:2064: error: (-215) p.checkVector(2, CV_32S) >= 0 in function polylines

[mlequeux]

Just pulled

VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument init done opengl support available bpm plot enabled OpenCV Error: Assertion failed (p.checkVector(2, CV_32S) >= 0) in polylines, file /home/abuild/rpmbuild/BUILD/OpenCV-2.3.1/modules/core/src/drawing.cpp, line 2064 Traceback (most recent call last): File "get_pulse.py", line 127, in App.main_loop() File "get_pulse.py", line 122, in main_loop self.key_handler() File "get_pulse.py", line 94, in key_handler self.key_controlskey File "get_pulse.py", line 64, in toggle_display_plot self.make_bpm_plot() File "get_pulse.py", line 80, in make_bpm_plot bg = self.processor.grab_faces.slices[0]) File "/home/lequeu_m/Downloads/webcam-pulse-detector/lib/interface.py", line 112, in plotXY cv2.polylines(z, [p], False, (255,255,255),1) cv2.error: /home/abuild/rpmbuild/BUILD/OpenCV-2.3.1/modules/core/src/drawing.cpp:2064: error: (-215) p.checkVector(2, CV_32S) >= 0 in function polylines

[ghost]

pts1 = numpy.array([[0,0],[100,100]], numpy.int32)
pts2 = numpy.array([[0,0],[0,500],[200,200]],numpy.int32)

seems to fix the problem in test_webcam.py

[mlequeux]

Yes

[thearn]

interesting - I'll test that out on my end and add that change in.

I also replaced cv2.polylines with iterations over cv2.line, since a google search shows that a ton of opencv installations seem to have problems with polylines (for some reason). The python bindings for opencv may not be entirely complete across platforms...

[ghost]

Apparently, the last push you did fixed this issue, however I'm getting this error now:

../bin/python get_pulse.py VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument VIDIOC_QUERYMENU: Invalid argument face detection lock = True bpm plot enabled Traceback (most recent call last): File "get_pulse.py", line 127, in App.main_loop() File "get_pulse.py", line 122, in main_loop self.key_handler() File "get_pulse.py", line 94, in key_handler self.key_controlskey File "get_pulse.py", line 65, in toggle_display_plot moveWindow(self.plot_title, self.w,0) File "/home/flacoste/homework/webcam-pulse-detector/openmdao-0.5.5/webcam-pulse-detector/lib/interface.py", line 15, in moveWindow return cv2.moveWindow(args,*kwargs) AttributeError: 'module' object has no attribute 'moveWindow'

[mlequeux]

Same than flacostec

[ghost]

Fixed my issue by returning nothing in that function.

lib/interface.py:14 def moveWindow(args,*kwargs): return

[mlequeux]

ITS WORKING

[thearn]

Excellent, thanks for the feedback on these bugs!

[ghost]

Thanks :+1:

[hyperknot]

I have this error now, upon pressing D. S and test-webcam works OK.

face detection lock = True bpm plot enabled OpenCV Error: Assertion failed (mat.isContinuous()) in unknown function, file .. ....\opencv-2.4.4\modules\core\src\opengl_interop.cpp, line 1153 Traceback (most recent call last): File "get_pulse.py", line 127, in App.main_loop() File "get_pulse.py", line 122, in main_loop self.key_handler() File "get_pulse.py", line 94, in key_handler self.key_controlskey File "get_pulse.py", line 64, in toggle_display_plot self.make_bpm_plot() File "get_pulse.py", line 80, in make_bpm_plot bg = self.processor.grab_faces.slices[0]) File "e:\docs\webcam-pulse-detector\lib\interface.py", line 120, in plotXY cv2.imshow(name,z) cv2.error: ......\opencv-2.4.4\modules\core\src\opengl_interop.cpp:1153: error : (-215) mat.isContinuous()

On 16 April 2013 17:02, flacostec [email protected] wrote:

Thanks [image: :+1:]

— Reply to this email directly or view it on GitHubhttps://github.com/thearn/webcam-pulse-detector/issues/3#issuecomment-16453719 .

[Feighery]

Sorry, was away. Just did a pull and all working now. Zero errors.

[hyperknot]

Sorry, this is still active. Pulled latest today, but still have the original bug:

bpm plot enabled
OpenCV Error: Assertion failed (mat.isContinuous()) in unknown function, file ..
\..\..\opencv-2.4.4\modules\core\src\opengl_interop.cpp, line 1153
Traceback (most recent call last):
  File "get_pulse.py", line 131, in <module>
App.main_loop()
  File "get_pulse.py", line 126, in main_loop
self.key_handler()
  File "get_pulse.py", line 98, in key_handler
self.key_controls[key]()
  File "get_pulse.py", line 65, in toggle_display_plot
self.make_bpm_plot()
  File "get_pulse.py", line 84, in make_bpm_plot
bg = self.processor.grab_faces.slices[0])
  File "e:\dev\libs-nosync\OpenMDAO\webcam-pulse-detector\lib\interface.py", lin
e 126, in plotXY
cv2.imshow(name,z)
cv2.error: ..\..\..\opencv-2.4.4\modules\core\src\opengl_interop.cpp:1153: error
: (-215) mat.isContinuous()

[mFoxRU]

Same problem with 'D' part. Win, Python 2.7, OpenCV 2.4.5, OpenMDAO 0.8.1