Gidday Leo
What is the advantage ( if any ) of using ProPhotoRGB in stead of Adobe RGB. I always save my converted files in Adobe RGB. Am I missing something?
Sorry, mate. I missed your post until just now. I generally peruse the overnight postings in threaded view as well as my normal flat view to check for just such posts as yours; but I still missed yours! Ah well, I have never claimed to be perfect, although some others have claimed this for me on my behalf ... ROTFLMHO ...
It really depends on your understanding of colour gamuts ... sRGB used on the web is very short in the green axis; AdobeRGB1998 is far better, being both a wider gamut and not deficient in the green part of the spectrum. ProPhotoRGB is a wider gamut again than AdobeRGB (wider than the human eye can see, IIRC).
The greater gamut size allows for greater latitude in editing without significant colour shifts, and far greater possibility that the editing software, colour management profile and printer driver will be able to reach an amicable agreement as to what the "true" colour will be translated into when printing. IF I am correct here, this is about the limits of my understanding of this subject. Certainly the limit that I can explain!! If you want more, buy the book below ... and study it for a long time, as I have.
Here is a diagram scanned from Blatner & Fraser's "Real World Photoshop CS". This is a very technical but practical book. It devotes a goodly part of its bulk to explaining colour and colour management in all parts of digital imaging and editing. I recommend this book (or later editions) to anyone seriously interested in this core matter. Since I am copying a tiny part of this text (less than half a page) for the genuine purposes of education, I have not sought permission of the publishers, as I understand that this is within the copyright law. If anyone informs me differently, I will immediately remove this image.
There is a larger size available on my web site if you wish to download and print it for personal study here:
http://canopuscomputing.com.au/gallery2/d/8631-1/Gamuts_comparison-B_F.jpg
I hope this helps, rather than further confuses you, although I suspect the latter will probably be the case ...
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Regards, john from Melbourne, Australia.
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The Camera doth not make the Man (or Woman) ...
Perhaps being kind to cats, dogs & children does ...
Gallery:
http://canopuscomputing.com.au/gallery2/main.php
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