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Static planes value not equal to 1
Posted: 2008-06-02T00:31:46-07:00
by picnicpete
Hi! I am trying to convert an image from bmp to png. It seems that the magick cannot read my bmp file. I also notice that the gimp cannot read it, but gqview and firefox are happy enough. In all cases I am using the latest up to date Ubuntu. That is, my convert version is Version: ImageMagick 6.3.7 02/19/08 Q16
The half meg image is at
picnicpete.com/Frame0000000128.bmp
Code: Select all
$ convert Frame0000000128.bmp F1.png
convert: Static planes value not equal to 1 `Frame0000000128.bmp'.
convert: missing an image filename `F1.png'.
One final hint: the image was created on a Mac - does that make a difference?
So my questions are,
- am I doing something wrong?
- is the image bad?
- should i refer this to bugs forum? (And the gimp bugs as well...)
- Is there another utility on Ubuntu I could use to make my conversion?
(Many thanks for assistance)
-Picnic Pete.
Re: Static planes value not equal to 1
Posted: 2008-06-02T09:31:53-07:00
by fmw42
you may want to post a link to an example image so that the IM folks can see why it is not valid. also have you tried
convert image.bmp -verbose info:
to see if tells you why it is not valid.
What app created it?
Re: Static planes value not equal to 1
Posted: 2008-06-02T11:39:18-07:00
by el_supremo
Any definition of a windows bitmap that I can find says that the biPlanes entry in the bitmap header must have a value of one.
In your image this entry is set to zero.
the image was created on a Mac - does that make a difference?
Presumably, the Mac software you used doesn't set the biPlanes value correctly.
When I edit the file, with a hex editor, and change that value to one, IM handles the file with no problem.
Pete
Re: Static planes value not equal to 1
Posted: 2008-06-02T11:48:55-07:00
by el_supremo
A suggestion for Magick:
In the ReadBMPImage function in coders/bmp.c where this value is checked at this code (near line 804 in the file):
Code: Select all
if (bmp_info.planes != 1)
ThrowReaderException(CorruptImageError,"StaticPlanesValueNotEqualToOne");
since a value of zero is meaningless, precede this with a test for zero and override it with the correct value:
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if (bmp_info.planes == 0) bmp_info.planes = 1;
Pete
Re: Static planes value not equal to 1
Posted: 2008-06-02T11:54:32-07:00
by fmw42
I am using Mac OSX Tiger and have taken the rose: image from IM and converted it to png. Then I used Preview, Debabelizer, GraphicConverter to save rose.png to rose.bmp using each app. Then I went back to IM and converted each bmp file to png and it worked for all 3 of these app's bmp file.
So what app did you use on the Mac to create your bmp file?
Re: Static planes value not equal to 1
Posted: 2008-06-02T15:26:59-07:00
by picnicpete
Dear fmw42,
My apologies for the URL link to my image not formatting correctly. (I have learned the preview button now.) The image is at
http://picnicpete.com/Frame0000000128.bmp
-verbose info: gives only the same error message.
I don't have ready access to a Mac. The image was created by a friend who ran the app called swtsg from
http://alienryderflex.com/crawl/
Many thanks for your assistance.
Dear el_supremo,
When I asked google about bmp format, he sent me to a page which is not sure what should go in that field - zero or one.
http://www.fortunecity.com/skyscraper/w ... ffrmt.html So I'm still not sure which side the bug is on. I don't know if it's a good idea for IM to be tolerant of bad input? I'm happy to leave this to the developers.
I want a command line solution to my problem, so I have done this:
Code: Select all
printf "\001" > 1
dd if=1 of=Frame0000000128.bmp bs=1 seek=26 conv=notrunc
And now all is good with my world. Many thanks for your assistance.
-Picnic
