Re: filmscanners: [OFF] problem with image brightness

["IronWorks" <ironworks@ameritech.net>]

That web browsers take no notice of embedded color spaces is correct.

However, one can color-manage graphics for web pages - many or most graphics
applications (and the Mac monitor in its default state) are set to 1.8
gamma.  The main reason for this, it seems to me, is so that WYSIWYG between
screen and printer (at least it works out thus for me).

However, PC monitors are set to gamma 2.2 and images prepared for printing
will seem bleached out.  IMHO the solution is to change the gamma of the
image, by changing your screen gamma to 2.2 and adjusting the gamma of the
image in your graphics program until it looks right at the PC gamma screen.

Alternately, you could guestimate the amount of gamma change to make, if
your screen is set permanently to gamma 1.8 or if it is too involved to be
changed.  The change would be to darken the image.

Maris

----- Original Message -----
From: "Derek Clarke" <derek_c@cix.co.uk>
To: <filmscanners@halftone.co.uk>
Sent: Wednesday, February 28, 2001 10:47 AM
Subject: RE: filmscanners: [OFF] problem with image brightness


| As far as I know there is absolutely nothing you can do to colour manage
| web graphics.
|
| Certainly there is no evidence that web browsers take any notice of
| embedded colour spaces, and if they did there's no point in doing so as
| user monitors are going to be about .001% calibrated and the rest
| uncalibrated!
|
| CookeJ@logica.com (Cooke, Julie) wrote:
|
| > Does everyone here embed sRGB colour spaces into web graphics? I wasn't
| > sure
| > if this was the best thing to do, I assume it would help standardise
| > how the
| > images are displayed on different machines. It would also increase file
| > size/image download time.
| >
| > I haven't on my site (www.lightdrawing.com), suggestions and comments
| > welcome BTW before it goes live!
| >
| > Julie
| >
| >
| >
| > -----Original Message-----
| > From: shAf [mailto:michael@shaffer.net]
| > Sent: 29 January 2001 16:47
| > To: filmscanners@halftone.co.uk
| > Cc: foto@zakrzewski.art.pl
| > Subject: RE: filmscanners: [OFF] problem with image brightness
| >
| >
| > tomasz writes ...
| >
| > > Me (photos) and my friend (HTML) are preparing my Internet
| > > photo gallery. The problem is that the photos I've
| > > prepared in Photoshop  4.0 are prefect on
| > > my screen, but when I view them through Internet Explorer
| > > 5.0 they appear much darker. ...
| > > ...
| > > I was told that I should change the gamma value of the monitor withi
| > n
| > > Photoshop (currently I have 1.8, changed for a while to 2.2
| > > and then the pictures looked equally dark as in IE 5.0.)
| >
| > If you load your image into your PS4 1.8 color space, and then
| > change
| > the PS4 monitor gamma to 2.2, the image should get darker.  If you wan
| > t your wwweb images to appear correctly on PC/Windows (typically gamma
| > =2.2 to 2.5), then 2.2 is your correct PS4 working gamma.  Also be sur
| > e to enter the "monitor setup" 'calibrate' dialog and use the "slider"
| > to ensure your gray patches are equal.
| >
| > HTH ... shAf  :o)
| >
| >
|