On 2/5/13 1:03 PM, Alexander Hansen wrote:
> On 2/5/13 10:35 AM, Eigil Krogh Sorensen wrote:
>> I don't know if this is the right place to post this, but anyway...
>>
>> I have this small octave function, that runs fine on my Windows Octave,
>> but crashes on my fink octave-atlas(3.6.3):
>>
>> "
>> function simpleImageExample
>> imageFile = "100-0039_IMG.JPG";
>> info = imfinfo (imageFile)
>> I = imread (imageFile);
>> subplot(2,1,1);
>> imshow(I);
>> endfunction
>> "
>>
>>
>> If I run the function as shown above, octave crashes with this messages
>> "
>> warning: your version of GraphicsMagick limits images to 16 bits per pixel
>> octave(18942,0x10b2db180) malloc: *** error for object 0x10b989570:
>> pointer bei
>> ng freed was not allocated
>> *** set a breakpoint in malloc_error_break to debug
>> panic: Abort trap: 6 -- stopping myself...
>> attempting to save variables to `octave-core'...
>> save to `octave-core' complete
>> "
>>
>>
>> The problem occurs in "imfinfo" because if I remove the line
>> "info = imfinfo (imageFile)"
>>
>> then I only get the warning
>> "
>>>>> simpleImageExample
>> warning: your version of GraphicsMagick limits images to 16 bits per pixel
>>>>>
>> "
>>
>> and the picture looks OK.
>>
>>
>> --Eigil
>>
>>
>>
>
> I can confirm this behavior.
>
> When I tried a local rebuild of graphicsmagick using
> "--with-quantum-depth=32" I still got a "warning: your version of
> GraphicsMagick limits images to 16 bits per pixel" message from Octave.
>
> The malloc() error goes away, but then the behavior gets really strange.
> I made up identical test.jpg and test.jpeg files, so one would think
> the error messages, if any, would be the same, but instead I get
> (10.8/x86_64):
>
> octave:1> imfinfo ("test.jpeg")
> warning: your version of GraphicsMagick limits images to 16 bits per pixel
> error: Magick++ exception: Magick: Unable to open file (g) reported by
> magick/constitute.c:1533 (ReadImage)
> error: called from:
> error: /sw/share/octave/3.6.3/m/image/imfinfo.m at line 147, column 10
> octave:1> imfinfo ("test.jpg")
> error: Magick++ exception: Magick: No decode delegate for this image
> format () reported by magick/constitute.c:1522 (ReadImage)
> error: called from:
> error: /sw/share/octave/3.6.3/m/image/imfinfo.m at line 147, column 10
>
> When I rebuilt graphicsmagick using "--with-quantum-depth=8" the results
> are still wrong, but at least more consistent:
>
> octave:1> imfinfo ("test.jpeg")
> warning: your version of GraphicsMagick limits images to 16 bits per pixel
> error: Magick++ exception: Magick: No decode delegate for this image
> format () reported by magick/constitute.c:1522 (ReadImage)
> error: called from:
> error: /sw/share/octave/3.6.3/m/image/imfinfo.m at line 147, column 10
> octave:1> imfinfo ("test.jpg")
> error: Magick++ exception: Magick: No decode delegate for this image
> format () reported by magick/constitute.c:1522 (ReadImage)
> error: called from:
> error: /sw/share/octave/3.6.3/m/image/imfinfo.m at line 147, column 10
>
>
>
> On 10.5/powerpc I get malloc() error messages but the image information
> shows up (same test.jpg and test.jpeg):
>
> octave:2> imfinfo ("test.jpeg")
> octave(47725) malloc: *** error for object 0xa08bf708: Non-aligned
> pointer being freed
> *** set a breakpoint in malloc_error_break to debug
> octave(47725) malloc: *** error for object 0xa08bf708: Non-aligned
> pointer being freed
> *** set a breakpoint in malloc_error_break to debug
> ans =
>
> scalar structure containing the fields:
>
> Filename = /Users/hansen/test.jpeg
> FileModDate = 5-Feb-2013 12:21:54
> FileSize = 26699
> Height = 241
> Width = 241
> BitDepth = 8
> Format = JPEG
> LongFormat = Joint Photographic Experts Group JFIF format
> XResolution = 0
> YResolution = 0
> TotalColors = 68
> TileName =
> AnimationDelay = 0
> AnimationIterations = 0
> ByteOrder = undefined
> Gamma = 0
> Matte = 0
> ModulusDepth = 8
> Quality = 75
> QuantizeColors = 256
> ResolutionUnits = undefined
> ColorType = grayscale
> View =
>
> octave:3> imfinfo ("test.jpg")
> octave(47725) malloc: *** error for object 0xa08bf708: Non-aligned
> pointer being freed
> *** set a breakpoint in malloc_error_break to debug
> octave(47725) malloc: *** error for object 0xa08bf708: Non-aligned
> pointer being freed
> *** set a breakpoint in malloc_error_break to debug
> ans =
>
> scalar structure containing the fields:
>
> Filename = /Users/hansen/test.jpg
> FileModDate = 5-Feb-2013 12:21:54
> FileSize = 26699
> Height = 241
> Width = 241
> BitDepth = 8
> Format = JPEG
> LongFormat = Joint Photographic Experts Group JFIF format
> XResolution = 0
> YResolution = 0
> TotalColors = 68
> TileName =
> AnimationDelay = 0
> AnimationIterations = 0
> ByteOrder = undefined
> Gamma = 0
> Matte = 0
> ModulusDepth = 8
> Quality = 75
> QuantizeColors = 256
> ResolutionUnits = undefined
> ColorType = grayscale
> View =
>
> I'll investigate this further.
>
And I've already got a result. :-)
The powerpc machine still had graphicsmagick-1.3.12 installed (also of
interest was that Octave didn't complain about the bits per pixel).
When I updated that, Octave issued the bits-per-pixel warning, but I
still got the right image information rather than a panic.
I'll continue to try to narrow down the issue.
--
Alexander Hansen, Ph.D.
Fink User Liaison
My package updates: http://finkakh.wordpress.com/
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