[ale] Digital Cameras + Gimp

[Sean Kilpatrick]

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On Wednesday 20 August 2003 08:24 pm, Christopher Fowler wrote:
> I've been using gimp to rotate pictures taken from a 
> digital camera.  I've noticed that if I load a picture in
> gimp then save it with no modifications the resulting file
> is smaller than the original.  Is something being changed?

Assuming you are dealing with jpeg images, every time you
SAVE the image the lossy compression guarantees some degradation
of the image.  For best results, if you have made _no_ changes
in the image, CLOSE the file *without* saving it. This will
avoid the recompression and detail loss that occurs when the
file is SAVED. Rotating the image constitutes a "change."
If you have the disk space (or can burn a CD) then SAVE all the
images as tif files. Expect file sizes to increase by a factor of
nearly 4. 

Sean


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