cdb wrote:
> On Wed, 25 Apr 2012 00:37:23 +0100, peter green wrote:
> :: Why the heck were you trying to do that? JPEG is a perfectly
> :: acceptable format
>
> To attach to an email to post here I need it as small as possible, PNG=20
> tends to do that
Not for photos it doesn't. PNG compression is simply not optimised for
photographic images and tends to produce relatively low compression=20
ratios on
them.

If you need to make a photo smaller and still keep it accessible to most=20
people
 you have basically to choices, lower the resoloution or lower the jpeg=20
quality
setting.
>  - doesn't solve th eproblem why Windows Paint, Windows=20
> Photo Manager all manage to convert jpg to png and manage to make it an=20
> order or two of magnitude larger.
Doesn't sound too unreasonable for me. You may find different png encoders
vary a bit but i'd be very surprised if any of them come close to the=20
size of the
original JPEG.
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.