Aaron Reynolds <[EMAIL PROTECTED]> wrote: > >On Feb 25, 2006, at 4:42 PM, Shel Belinkoff wrote: > >> What you're asking is not possible. Once a file has been saved in >> another form, like TIFF, JPEG, PSD, it cannot be reconverted back to RAW. > >Just for my own curiosity, is it because of nature of the file itself >(as in, is it theoretically impossible) or is it just a software >limitation?
Well, sort of both... In a RAW file, each pixel is either red OR green OR blue, in 12-bit values. Once the file is demosaiced into a 24-bit or 48-bit bitmapped image in which each pixel contains red, green and blue data, it's a big job to convert it back. Probably could be done but I don't know if anyone's done it yet. As I mentioned before, DXO Labs software *can* manipulate "lighting", which I take to mean brightness/contrast/highlight/shadows, and save in RAW format. -- Mark Roberts Photography and writing www.robertstech.com
