Luminous Landscape Forum

Raw & Post Processing, Printing => Digital Image Processing => Topic started by: hilljf on October 20, 2007, 10:34:12 pm

Title: Profile matching human vision
Post by: hilljf on October 20, 2007, 10:34:12 pm

Does there exist a series of profiles which map to what humans can normally see.  As we focus on good color management and compare the gamut of an image to color spaces and ultimately to paper profiles, it would be interesting to overlay a typical map of what someone can see.   If a color is cliped which normal people can not see anyway it will not mater.

Thanks for your thought on this topic.

John

Title: Profile matching human vision
Post by: marcmccalmont on October 20, 2007, 11:11:18 pm

http://www.josephholmes.com/profiles.html (http://www.josephholmes.com/profiles.html)

I have had very good results with Joe Holmes Dcam3 and Dcam4 color spaces. Their chroma variants are a very natural way to adjust saturation also. Your raw converter must allow custom ICC profiles for these to work.
Marc

Title: Profile matching human vision
Post by: Richard Marcellus on October 21, 2007, 12:09:24 am

Quote

Does there exist a series of profiles which map to what humans can normally see.  As we focus on good color management and compare the gamut of an image to color spaces and ultimately to paper profiles, it would be interesting to overlay a typical map of what someone can see.   If a color is cliped which normal people can not see anyway it will not mater.

Thanks for your thought on this topic.

John
[{POST_SNAPBACK}][/a] (http://index.php?act=findpost&pid=147526\")

To me it makes the most sense to use a colour space that won't clip anything. After post-processing, out of gamut colours could be brought in gamut.

Personally I prefer to not clip any colour and for this I use ProPhotoRGB. It will hold all of the colour your camera can capture, all of the colour your monitor can show, and all of the colour you can print today (and likely tomorrow with improved ink technologies).

However, even though ProPhotoRGB is a big colour space it still doesn't encompass all of human vision. LAB is the colour space of human vision.

Michael has a good tutorial on ProPhotoRGB:
[a href=\"http://www.luminous-landscape.com/tutorials/prophoto-rgb.shtml]http://www.luminous-landscape.com/tutorial...photo-rgb.shtml[/url]

Richard