Janus van Helfteren wrote: > Thomas , thanks for the reply , are you telling me that a camera can be > profiled to 'correct' a dark green that appears black , when the school > tie (which to the eye looks the same green) is recording as green ? > This , for those who are interested , is the typical scenario of > spectral reflection , which as Thomas points out, travels under several > names .
The short explanation is that it's very likely that it can (always being careful about absolute statements). I have seen many similar types of problems where greens record as dark brown being fixed, and red's appearing magenta or too warm being fixed, so yes it is very likely. It is impossible to say with absolute certainty that it can fix this particular problem, as it's a question of whether your camera can actually see that colour at all (hence the Observer metamerism label). If your eye can see both colours being similar, the the problem must be that the camera's sensitivity to this part of the spectrum is different from humans. At the recent seminar I did with Neil in London we shot the same scene with a Canon D10 in JPEG and a �15 grand Sinar back in 16 bit. The results were VERY different from the two backs. Building a profile pulled both in to be VERY similar except for a light blue colour. Measuring that one colour that was off on the Canon, and incorporating that into the profile yielded similar colour from both cameras (the Sinar was of course free of noise and a bit sharper). We did comparative prints and showed in a lightbooth, along with the original products. I'm the attendees from the seminar can concur on this (chime in guys). Best Regards, Thomas Holm / Pixl Aps - Photographer, Educator, Colour Management Consultant & Seminar speaker - Remote Profiling Service (Output ICC profiles) - www.pixl.dk � Email: th[AT]pixl.dk -- =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
