on 19/11/04 10:52 am, matthew ward wrote: > if you want to express something to between 32,769 and 65536 levels on > precision, you need a 16 bit environment to do it in. If you want to > express something to 32,768 levels of precision you could get away with > a 15 bit environment.
Which was the *humorous* point that I thought I was making :-) Photoshop's 16-bit values are actually 15-bit + 1 unit - not 15-bit + another bit. 8-bit gives you 256 possible values: 0-255 15-bit gives you 32768 possible values: 0-32767 However, Photoshop gives us an odd 32,769 values: 0-3768 - which is 1 unit more than 15-bit, but nowhere near the 65536 levels that you mentioned in your original post. Basic maths innit? You can't get an odd number if you multiply something by two... Maybe somebody from Adobe can explain how to make 2^15 = 32769 ? -- Martin Orpen Idea Digital Imaging Ltd -- The Image Specialists http://www.idea-digital.com =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
