Using PerlMagick to get TIFF header information

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Adam Witney - 23 Feb 2006 23:17 GMT

Hi,

I am using PerlMagick to parse a TIFF file as I need to extract some
information from the header section. I can get Tags like Make and Model, but
I need to get some of the others (specifically Host Computer).... The
information can be extracted using ImageMagick's identify -verbose, but I
don't know how to get to all the tags using PerlMagick.

Does anyone know how to get all the header tag information or at least get a
list of the available tags with PerlMagick?

Thanks for any help

Adam

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Alan Fry - 24 Feb 2006 12:08 GMT

Does GetAttribute() return what you need? There is a list of
'attributes' for 'set' and 'get' in<www.imagemagic.org/script/perl-
magic.php> which might be helpful.

HTH

Alan Fry

> Hi,
>
[quoted text clipped - 13 lines]
>
> Adam

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Adam Witney - 24 Feb 2006 13:09 GMT

Hi Alan,

Thanks for your reply.

Unfortunately you need to know the attribute name for GetAttribute, The
vendor that generates these TIFFs have stuck the information I need in
TIFFTAG_HOSTCOMPUTER for some strange reason, I know its there from the
identify -verbose output, but it doesn't seem to be accessible from
PerlMagick

I was hoping that there was a method that would return all attribute names
and values, say for example by calling GetAttribute() with no arguments...
But I can't see that there is one that does this...

I have actually managed to hack ImageMagick to make TIFFTAG_HOSTCOMPUTER
accessible, but this means I have to recompile it on the target OS's, fine
for my Mac, but not ideal as I have to run this on Windows also, and I have
no idea to compile it there!

Thanks again for your help

Adam

> Does GetAttribute() return what you need? There is a list of
> 'attributes' for 'set' and 'get' in<www.imagemagic.org/script/perl-
[quoted text clipped - 21 lines]
>>
>> Adam

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Mac Forum / Programming / Perl / February 2006

Using PerlMagick to get TIFF header information