Re: [Ids-devel] jpegtran

[John M. <mo...@mu...>]

Thanks.

What is everybody's opinion on this? Is it worth requiring another package
to do lossless rotations of JPEG's? I like the idea, but folks seem to have
a lot of trouble installing IDS as it is. (I'll admit that my documentation
is pretty sparse...)

While we're on the subject- does anyone know of other image manipulation
packages we should be looking at? I've often wondered if replacing
ImageMagick with a more specialized program would make IDS noticably faster.
Code profiling suggests that IDS spends most of its time in Image::Magick
and the CGI lib. I chose ImageMagick because of its Perl interface- I've
been trying to avoid making system calls.

BTW, the later versions of ImageMagick do preserve EXIF data through
manipulations.

John



on 2/14/01 6:36 PM, Anders Bandholm at And...@un... wrote:
> Hi!
> 
> First: Thanks for a great package. I really needed something of this sort,
> and IDS seems to have the right level of sophistication: It seems to have
> all the right features - and just those!
> 
> And now a suggestion:
> 
> Have you thought about using 'jpegtran' for rotations? jpegtran has the
> benefit of allowing you make a lossless rotate since it manipulates the
> image file directly without doing the decode/rotate/encode process. An
> added benefit is that it has an option called 'copy all', which copies all
> markers into the rotated image - and this actually preserves Exif data!
> 
> On Debian, jpegtran is part of the libjpeg-progs package
> 
> Cheers,
> Anders
> --
> Anders Bandholm, UNI-C, Aarhus
> Email: And...@un...
> Phone:  (+45) 8937-6645   Fax: (+45) 8937-6677    ICQ: 20617502
> PGP: id=0x42691C89; fp=D7DF EF78 0C55 9E9B  C9EA 3D07 6500 A1BB
> 
> 
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