Your advice is good, and your details are correct to my knowledge. But GIF is like 8bit PNG, only
good in some situations. For complex transparency and backgrounds 24bit PNG is best. for simple art
and simple backgrounds GIF or 8bit PNG is good. For smallest file size where the background can be
made part of the image and transparency ignored, JPG will be best.
Thanks for the colo(u)r links!
On 7/14/15 4:48 PM, Geoff Thompson wrote:
> Hi Linda,
> Have you thought of using a GIF? They are very common on the web and can preserve transparency.
> I wouldnít be looking at the dpi so much but rather at the actual number of pixels wide at 100%.
> As far as Iím aware the compression of colour space from Adobe RGB to sRGB (the much smaller colour
> space used by the web and all cheaper monitors) does not work anymore. This may have been fixed but
> I have not tried it for quite a while. I believe it was using a Kodak engine that was taken down
> when Kodak went broke. For some reason in Photoshop CS6 ďConvert to ProfileĒ seems to work and uses
> a different engine. Iím not sure about CS5. There are also other methods of editing out of gamut
> colours I havenít played with. http://www.leswalkling.com/words/the-theory-of-practice/
> You need to be working on a good monitor that sees 99% of Adobe RGB like an EIZO ColorEdge to really
> see the colours in the original and then see how they are compressed relatively, so that you donít
> get flat areas of patchy colour as demonstrated in the paper "Editing Out-of-Gamut Colours" on that
> Itís possible that if the original is in CMYK there are few if any out of gamut colours in it when
> converted to sRGB but Iím not sure about that.
> Hope Iíve helped rather than confused?
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