Re: [libreoffice-marketing] branding colors - missmatch

I know that JPG is not lossless. I was just referring to the gamma correction.

2011/1/17 Ivan M. <ivanm@patentpending.co.nz>:
> Hi Tom, Johannes, Thomas, Christoph, all,
>
> On Mon, Jan 17, 2011 at 11:09 PM, Tom Davies <tomdavies04@yahoo.co.uk> wrote:
> > Jpg does horrible things to pictures especially when not pushing pictures up to
> > top-quality when saving.  All those horrible swirls and ripples around corners
> > remind me of a boat cutting through water.  Surely gif is a better format if you
> > want something lighter than png?  Hmm, i am not sure about colour-matching tho!
>
> PNG is usually produces smaller file sizes than GIF (when saved in the
> correct bit depth of course). PNGOUT and/or PNGCRUSH can be used
> reduce the file size further in many cases.
> There is a special setting in PNG that can prevent the gamma
> information being included (see
> http://f6design.com/journal/2006/12/01/fixing-png-gamma/ for more info
> including a Windows program that does this) and thus allows color
> consistency to be achieved among modern browsers.
> JPEG can alter colors too depending on the compression (and software),
> so don't always expect exact results when comparing the color value of
> a lossless image and a JPEG.
>
> Regards,
> Ivan.
>
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