Archived posting to the Leica Users Group, 2004/02/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Henning Wulff wrote: > Most digital cameras have sensors that capture more than 8 > bits/channel, but most reduce this to 8 bits to be able to output the > files as JPEGs. That's standard JPEG, as understood by most of the > industry, not JPEG2000, which can handle high bit images, but is > understood by few programs. > > Cameras that can output RAW, or NEF, or DCR output more than 8 > bits/channel. Generally 12 or 14 at this time. Software is then needed > to convert that to a useable 16 bit/channel file that Photoshop can > deal with, or reduce it to 8 bits than any program and the web can > deal with. Photoshop can read 48 bit TIFF files -- indeed the TIFF format is the only one I use with Photoshiop (7/CS) as it can save layers, alpha channels etc. It is unfortunate that the cameras don't save in TIFF format directly, but in any case one might consider converting from a device dependent RAW TIFF colorspace into a device independent colorspace (e.g. Adobe1998/ProPhoto etc.) for editing purposes. Jonathan* *who exclusively uses digital Leica products, the Digital M3 -- Tri-X etc. souped in whatever and scanned into Photoshop -- 5400 x 7000+ x 48 bit resolution for under a grand :-)) Jonathan - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html