Hello Mike,

I am preprocessing my Nikon  pictures ( under adobe RGB within the camera) using  using now permanently the Prophoto RGB color space within the derawtizer Nikon Capture Nx2 . Then i generate tiffs to enter in QI.

Please can you tell most of us,  if there is any inconveneince for QI to leave ProhotoRGB as color space before entering QI or do we have  to  convert explicitely in adobe Rgb or any better color space before genating tiffs for QI ingestion.


MAny thanks in advance

C Torres

Toulouse France

Thanks Brian,

Effectively i made a test which confirm that QI keep prophoto and doesnt convert to other system : when the picture is in Prophoto, all colors and tones around the mid values are kept  but the contrast and saturation are smooth and of low saturation. I didnt tested with extreme colors, but you are right.

But, ok that a litre ( of wine for me) within a glass of 10 remains 1 litre. But when doing a cascade of sophisticated processings you keep a bit more smoothness in a wider space than on a limited space or in any case errors remains lower for smooth transition. Then when converting to argb i imagine i have a chance to keep my smoothest transitions  if not they are gone before entering into QI.

Just for info Adobe  lightroom is now internally working in prophoto and no longer in arvb even if most of their customers are working in srgb and arvb.

Claude

Ok thanks .

So it means that pictures need to be converted in other system because QI doesnt know or manage Prophoto.
I will test both.

Not So.

Qimage will read and honor embedded profiles.
See snaps

Fred

I recently discovered my TIFF files out of Photoshop CS5 are 48 bit.  I've been playing with ProPhoto lately and something is messed up.  Some, depending on some CS5 Actions I've used, will drop from 48 bit to 24 bit when I look at their internal data.

If I go right from the camera via JPG or NEF (Nikon) images look fine in QI 2012 and print the same using the profiles I have for the papers I made using Prism 7.

If I go through Photoshop and do some PP work and save as a TIFF, the thumbnails in QI look reddish are dark.  Prints aren't much better.

Something is screwy in my PS CS5 somewhere or some other profiles are crossing over someplace.  I have Paint Shop Pro X3 as well as DataColor Spyder so something is messing up the TIF's in CS5 and QI is not liking it.  I know from CS5 (64 bit) to PSP X3 issues can result in screen color and output.  PSP X3 is back in 8 bit era or somewhere.

Don't know why it looks great in CS5 and I save to TIFF and QI2012 will see it as red and dark in the thumbnails?  BMP out of CS5 to QI2012 are a bit better, but still off.   


Mack