[argyllcms] Re: ImageTarget version 0.1.1 released
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 16 May 2008 09:55:50 +1000
Alastair M. Robinson wrote:
I suppose the "correct" way to approach this would be to use a proper
sub-pixel box filter downsampling, operating in Lab space. (I'm a
little nervous, though, about the prospect of generating the gamut from
Lab-transformed data and then expecting it to "line up" with the
original image/colourspace/profile for the icclink call - in theory it
should work. Once Graeme's next beta is out (which I think he said
includes changes to tiffgamut to allow it to support Lab TIFFs) I shall
try it :) )
There are many possible definitions of "correct", but one that is
quite useful, is "real world correct", as in "what would the pixel
values be if I had taken a picture twice as far away, or with
twice the field of view ?". And the answer is that operations
such as down sampling or anti-aliasing should be performed in a
linear light space if they are to model what would happen in
the real world.
Graeme Gill.
Other related posts:
