Computer Graphics with Photoshop

Author

Save for Web

Mike

2006-05-22, 10:16 pm

Hi,

My wife and I both shoot RAW, me with a Canon 1DMk2N and her with a Fuji
s9500. I print most of my pictures, but she likes to post hers on the
Internet.

We've come across something we don't understand. If she processes one of her
Fuji Raw files, then tries to Save for Web, the colours become very very
dull. However, if she takes a jpg straight out of the camera and then Saves
for Web, the colours are fine. With my Canon, both RAW and jpg files are
also very vivid when I Save for Web.

What could be going on that makes RAW files out of the Fuji lose their
vibrance completely when we try to Save for Web after processing? They are
fine if we save them normally as jpg or tiff.

Bill Hilton

2006-05-22, 10:16 pm

>Mike writes ...
>
>If she processes one of her Fuji Raw files, then tries to Save
>for Web, the colours become very very dull. However, if she
>takes a jpg straight out of the camera and then Saves
>for Web, the colours are fine.

Most likely her jpegs are sRGB while the RAW files get converted to a
wider gamut space like ProPhoto or AdobeRGB. 'save for web' ignores
the profiles (you can chose to attach them but not many browsers will
use them) so sRGB files look pretty similar to non-color managed files
but saturated colors from wider gamut files look dull. You can really
see this with the ProPhotoRGB image in my samples below.

You can avoid this by converting the working space to sRGB before going
to 'save for web' ...

>With my Canon, both RAW and jpg files are
>also very vivid when I Save for Web.

Probably you are saving both as sRGB.

Here are three files I did as an example earlier ... the same RAW file
was converted to tiff in sRGB, AdobeRGB and ProPhotoRGB working spaces
and the color 'red' has three very different RGB values, though in a
color managed application like Photoshop all three look similar ... if
I converted to sRGB and then 'save for web' all would look similar but
just running 'save for web' the profiles are dropped and the wide gamut
reds look very poor ... if you wish you can download these and assign
the profiles in Photoshop and they will then look very similar ...

http://members.aol.com/bhilton665/hilton_prophoto.jpg
http://members.aol.com/bhilton665/hilton_adobergb.jpg
http://members.aol.com/bhilton665/hilton_srgb.jpg

Bill

Mike

2006-05-23, 3:21 am

"Bill Hilton" <bhilton665@aol.com> wrote in message
news:1148349766.061199.105520@g10g2000cwb.googlegroups.com...
>
> Most likely her jpegs are sRGB while the RAW files get converted to a
> wider gamut space like ProPhoto or AdobeRGB. 'save for web' ignores
> the profiles (you can chose to attach them but not many browsers will
> use them) so sRGB files look pretty similar to non-color managed files
> but saturated colors from wider gamut files look dull. You can really
> see this with the ProPhotoRGB image in my samples below.
>
> You can avoid this by converting the working space to sRGB before going
> to 'save for web' ...
>
>
> Probably you are saving both as sRGB.
>
> Here are three files I did as an example earlier ... the same RAW file
> was converted to tiff in sRGB, AdobeRGB and ProPhotoRGB working spaces
> and the color 'red' has three very different RGB values, though in a
> color managed application like Photoshop all three look similar ... if
> I converted to sRGB and then 'save for web' all would look similar but
> just running 'save for web' the profiles are dropped and the wide gamut
> reds look very poor ... if you wish you can download these and assign
> the profiles in Photoshop and they will then look very similar ...
>
> http://members.aol.com/bhilton665/hilton_prophoto.jpg
> http://members.aol.com/bhilton665/hilton_adobergb.jpg
> http://members.aol.com/bhilton665/hilton_srgb.jpg
>
> Bill
>

Many thanks Bill, I think you've solved it for me. I will check our colour
settings when I get home.
Cheers.