python - probem with IMWRITE_JPEG_QUALITY in imwrite() (Bug #2193)

Added by Pavel Campr over 12 years ago. Updated about 12 years ago.

Status:Done Start date:2012-07-25
Priority:Normal Due date:
Assignee:Vadim Pisarevsky % Done:

0%
Category:python bindings
Target version:2.4.4
Affected version:2.4.3 Operating System:
Difficulty: HW Platform:
Pull request:

Description

as discussed here: http://stackoverflow.com/questions/10410521/opencv-python-save-jpg-specifying-quality-gives-systemerror

1cv2.imwrite('img_CV2_90.jpg', a, [cv2.IMWRITE_JPEG_QUALITY, 90])

fails with exception:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
SystemError: error return without exception set

This works (when cv2.IMWRITE_JPEG_QUALITY is converter from long to int ):

1cv2.imwrite('img_CV2_90.jpg', a, [int(cv2.IMWRITE_JPEG_QUALITY), 90])

Associated revisions

Revision 4044fbcb
Added by Vadim Pisarevsky about 12 years ago

hopefully fixed handling of 'long' Python type in OpenCV bindings (bug #2193). added the corresponding test

Revision 078d4960
Added by Roman Donchenko about 11 years ago

Merge pull request #2193 from apavlenko:2.4_lic_remove

History

#1
Updated by Daniil Osokin over 12 years ago

Which version of OpenCV do you use?

#2
Updated by Daniil Osokin over 12 years ago

  • Assignee changed from Vadim Pisarevsky to Pavel Campr

#3
Updated by Daniil Osokin over 12 years ago

  • Assignee deleted (Pavel Campr)

#4
Updated by Pavel Campr over 12 years ago

I use OpenCV 2.4.2 (compiled from 2.4.2 svn tag, ubuntu 12, 64bit)

#5
Updated by Pavel Campr over 12 years ago

same happens on Windows 7, 64 bit, OpenCV development version from June 2012 (2.4.x).
python is 2.7

#6
Updated by Andrey Kamaev over 12 years ago

  • Description changed from as discussed here: http://stackoverflow.com/questions/10410521/opencv-python-... to as discussed here: http://stackoverflow.com/questions/10410521/opencv-python-... More
  • Assignee set to Vadim Pisarevsky

#7
Updated by Vadim Pisarevsky about 12 years ago

  • Affected version set to 2.4.3
  • Target version deleted ()

#8
Updated by Vadim Pisarevsky about 12 years ago

  • Assignee deleted (Vadim Pisarevsky)

#9
Updated by Vadim Pisarevsky about 12 years ago

  • Assignee set to Vadim Pisarevsky

#10
Updated by Vadim Pisarevsky about 12 years ago

fixed in 2.4 branch

  • Status changed from Open to Done

#11
Updated by Kirill Kornyakov about 12 years ago

  • Target version set to 2.4.4

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