Den 05/02/13 21.03 skrev "Alexander Hansen" <alexanderk.han...@gmail.com>:
>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.
>
>--
>Alexander Hansen, Ph.D.
>Fink User Liaison
>My package updates: http://finkakh.wordpress.com/
FYI:
Did try to rebuild graphicsMagick (and octave-atlas had to be build also)
to 32 bits. On my system that din not make the performance noticeably
worse.
Now I'm back on latest fink versions of GraphicsMagick and octave-atlas
--Eigil
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