lossless batch processing of jpeg pictures (os x)

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pierre lemercier - 26 Mar 2008 11:01 GMT

Is there an easy (possibly free) software to do that?

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pierre lemercier - 26 Mar 2008 11:13 GMT

> Is there an easy (possibly free) software to do that?

I mean Is there an easy (possibly free) software to do lossless
rotations in batch mode?

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Chris Malcolm - 26 Mar 2008 15:35 GMT

>> Is there an easy (possibly free) software to do that?

> I mean Is there an easy (possibly free) software to do lossless
> rotations in batch mode?

If the rotations are by integral numbers of right angles, Irfanview
(shareware) can batch process those.

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Chris Malcolm cam@infirmatics.ed.ac.uk DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]

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me@mine.net - 27 Mar 2008 01:31 GMT

>>> Is there an easy (possibly free) software to do that?
>
[quoted text clipped - 3 lines]
>If the rotations are by integral numbers of right angles, Irfanview
>(shareware) can batch process those.

However, if you look at the subject line, he's running OS X on a Mac.
Irfanview is PC only. Maybe image magic or graphic converter?

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Paul Allen - 28 Mar 2008 18:12 GMT

On Wed, 26 Mar 2008 20:31:27 -0400, me wrote:

>>>> Is there an easy (possibly free) software to do that?
>>
[quoted text clipped - 6 lines]
> However, if you look at the subject line, he's running OS X on a Mac.
> Irfanview is PC only. Maybe image magic or graphic converter?

ImageMagick doesn't do lossless rotation. Jpegtran with the lossless
crop/rotate patch would probably compile on OS/X. It would be
trivial to use in a script to process batches of images. For the
same reason as Irfanview, jpegtran will only rotate in 90 degree
increments.

Paul Allen

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