opencv functions (cvFindCornerSubPix) return Segmentation fault

[toomuchcookies]

I was trying to implement a camera calibration using opencv-python and it produced Segmentation faults upon using cv.FindCornerSubPix. To test it, i used the example calibration.cpp:

1. It finds the camera and gets the image without problems
2. If a chessboard is partly in the image, it finds the corners that are visible
3. Whenever the whole chessboard appears inside the image, the program crashes with a segmentation fault.

Here is the output:

./calibration -w 8 -h 8
When the live video from camera is used as input, the following hot-keys may be used:
  <ESC>, 'q' - quit the program
  'g' - start capturing images
  'u' - switch undistortion on/off
Segmentation fault

[hendeby (hendeby)]

Do you by any chance use a 32bit system? I have a similar problem with a seg fault caused by a call to lapack/blas in opencv (I think it is in the same function but at C level, I'm unfortunately not able to test right now). This only occurs on my 32bit system, and it went away when I recompile opencv with their own lapack implementation instead of linking with the Ubuntu lapack package.

[toomuchcookies (kontakt-toomuchcookies)]

That's a yes. I'm running 32-bit.

[Timo Dickscheid (dicksche)]

I am having the same problem here, also running a the 32 bit version of Maverick. The crash happens every time I call cv.FindCornerSubPix.

[Leandro Pavón Serrano (leandroteleco)]

I'm having the same problem.
I'm using C++ implementation and OpenCV2.3 in 32-bit Ubuntu 10.04LTS.
But the same code works fine in Ubuntu 10.10 64-bit version.

[Emanuele Russo (emanuele-russo)]

I also have the same problem, in C++
when call the function: findChessBoarrdCorners(...)

with tis message:

"Program received signal SIGSEV, Segmentation Fault.
In ATL_dgemvT_a1_x1_b0_y1( ) ( /usr/lib/libblas.so.3gf )"

...the problem arised after the installation of octave and scilab...

Ubuntu 11.04
+ OpenCV 2.1.0-3ubuntu1
+ libblas3gf 1.2-8
(+octave 3.2+scilab...)

[Emanuele Russo (emanuele-russo)]

sorry, the interested package is not "libblas3gf 1.2-8" but "libatlas3gf-base 3.8.3-29".

[Emanuele Russo (emanuele-russo)]

After removing: libatlas3gf-bas (3.8.3-29) all works fine.
(solved for me)

[haralampi (xzardaz)]

Same for me - after removing libatlas3gf-base works fine.