Re: a bit OT: optimisztion of images - help?

Angus Manwaring wrote:
On 15-Mar-07 20:39:04, frederick said
Angus Manwaring wrote:
I was actually trying to reduce the size of computer game screen shots to
adorn my website with. My website has over 1000 reviews of Amiga computer
games so I wanted to be doing it right. Anyway, an internet buddy took one
of my raw .bmp screenshots and reduced it to a bit more than 10k in png
format. I have not yet been able to get him to tell me his secret.

I have been messing about with Adobe Photoshop - Image Ready and Save for
web etc, but cannot get close to that.

Can any of you explain how this is done?

If you're interested the original image is here:


http://www.angusm.demon.co.uk/AGDB/howthehell/

png format is probably the best compression format for your purpose -
with far less artifacts on images with areas of the same colour and
geometic patterns - like your game screenshots.
You can simply "save as png" from photoshop.

Yup, sorry I perhaps didn't make myself clear. I'm fine with saving in a
given format, but its the intricacies of optimising for that format in
Image Ready, Fireworks or whatever that I'm after.

I felt sure somebody here would know, said Angus provocatively. :)


The sample screenshot you posted is RGB and has more than 256 colours.
Was that the original size - or did you resize in PS? Was that the image your friend saved as 10kb png?
For saving in *png(using The Gimp):
Converting colour mode to 256 colour indexed. Save as png, level 9 compression. File size 36.4 kb
http://i14.tinypic.com/4hlas0k.png
Convert to 16 colours indexed (no dithering), save as png level 9 compression. File size 11.7kb.
http://i17.tinypic.com/35lt83k.png
Leave as RGB, save as jpeg. Quality 25 (out of 100), DCT method - floating. File size 11.7kb.
http://i18.tinypic.com/29o4y81.jpg

.

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