Are the users here aware that Photoshop has a truncated form of 16 bit support however that Photo-PAINT X4 seems to be able to save all 16 bit data in a file?
David Milisock
David Milisock: Are the users here aware that Photoshop has a truncated form of 16 bit support however that Photo-PAINT X4 seems to be able to save all 16 bit data in a file?
Please elaborate David.Truncated meaning "limited numbers of digits and decimals", basically "cut off" ro "Less".Do you mean that the 16 bit Photoshop uses is less good than the Photo-Paint X4 16 bit?
Stefan Lindblad Artist & illustrator Website: www.stefanlindblad.com Blog: stefanlindblad-english.blogpsot.com -------------------------------------------------------------------------- Dont forget pen & paper, they are the key to great digital art.
If memory serves. PS uses only 15 bits of data per channel and keeps the last bit for "housekeeping processing".
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FROM THE LINDBLOOM SITE
"In theory, a 16-bit image may contain up to 65,536 unique levels per channel. My reference images show approximately this number of levels. However, Adobe Photoshop represents 16-bit image data as a 16-bit unsigned integer, in a form that has the binary point between bits 14 and 15, and therefore can only represent 32,769 unique levels (binary 0000000000000000 through 1000000000000000). This means that simply opening and saving one of the 16-bit reference images will reduce the number of unique levels per channel by about half (which will also reduce the total number of unique colors)."
Stefan Lindblad:Do you mean that the 16 bit Photoshop uses is less good than the Photo-Paint X4 16 bit?
Yes according to Bruce.
What happened is that I was doing some light reading and hit a link to his site and read this section and copied him on my thoughts. When he got back from holiday he was nice enough to return my communication and we did a test of Corel Photo-PAINTS 16 bit capabilities, which he reported to me as NO LOSS OF COLOR.
I am posting a link for him to get some more information from me today, BTW he used to work for Corel some time ago.
I don't know why Adobe selling what is supposed to be a professional level image editor for photography would do such a thing. I advise people to archive 16 bit RGB and would love to see Corel be able to offer 16 bit LAB for archival purposes.
This PS thing is just another example of Adobe arrogance, IMO.
Does it really matter to someone like me? My best camera can only output a RAW file in 14 bits.
As PS is a smaller part of my workflow than my RAW converter, I am wondering if the specs of Lightroom (and by extension ACR, its native engine) are sending a true 16 bit file out into the image editor. Then PS dumbs it down? Or is the Adobe-based RAW converter also cheating on the bits? If this is the case, a Lightroom - PP workflow make a little more sense than a LR -PS workflow.
Rikk Flohr: Does it really matter to someone like me? My best camera can only output a RAW file in 14 bits.
Right now most likely not. Are you never going to buy a different camera? Then it may. My job is to work on developing the best technical platform for now and the future. If we're shooting and converting to 16 bit then the conversion process better really support a true 16 bit. Captures done now archived as a true 16 bit LAB will be viable for many years to come. Obviously if we can get PP ther best, right now PP is 16 bit ultra wide gamut RGB.
There isn't a sensor above 14bit that I know of.
But if you want to be fussy PS does 32bit per channel anyway.
Ned's Mother -- You gotta help us, Doc. We've tried nothing and we're fresh out of ideas! ( The Simpsons, Hurricane Neddy -- Season:8 Episode:8 First Aired:12/29/1996 )
Yani: But if you want to be fussy PS does 32bit per channel anyway.
Not according to the color scientists. the problem as i see it right now is PP has a slight technology edge that allows it to support future Bayer capture patterns. best if we make sure people know about it.
Besides MegaVision is promoting their 16 bit CCD, texas Instruments has 16 and 20 bit stuff. So a true 16 bit archival process is state of the art at present.