I suggested 16 bits just gray scale. color would of course be more than 16 bits (48 bits?). JCO
-----Original Message----- From: David Madsen [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 27, 2004 11:46 PM To: [EMAIL PROTECTED] Subject: RE: state of the art 35mm DSLR I have heard that the eye/brain sees up to 32 bit, which 12 bits per channel surpasses. -----Original Message----- From: J. C. O'Connell [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 27, 2004 5:19 PM To: [EMAIL PROTECTED] Subject: RE: state of the art 35mm DSLR I said I thought visible distinguishable shades was less than 16 bit (64K shades). That means I think 16 bits is sufficient, it doesn't mean I think 8 bits is. Image editng is another issue altogether because of the precision of the iterated math affects the image quality to a very visable extent. JCO -----Original Message----- From: Rob Studdert [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 27, 2004 7:02 PM To: [EMAIL PROTECTED] Subject: RE: state of the art 35mm DSLR On 27 Oct 2004 at 18:48, J. C. O'Connell wrote: > Don't forget there are limits to how many shades of > gray the human eye can distinguish, how many shades > that is I don't know but I have a hunch it is less > than 2^16 shades (16 bit grayscale)which is 64K shades. Well even if humans are incapable of distinguishing more than 255 luminance levels working in 16bits is still a real advantage whilst editing. If the gamma or overall luminance is shifted the fact that only 255 grey-scale steps are available becomes patently apparent. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
