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/
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