[argyllcms] Re: ImageTarget version 0.1.1 released

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.

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