You're wrong. You've lost too much information in the original capture. Given any two sensors with different spectral sensitivities it's always possible to come up with a pair of stimulus colours which look identical to the first sensor, but which appear different to the second sensor.
There's no way you can post-process that first image to simulate the response of the second sensor; you can never distinguish between the two colours which produced identical responses on the first sensor. > in a bandwidth limited image like a scan or a digital sensor, it is > possible, if the final output is a digital print. it is possible, without > too much exotic hardware or software, to produce a print where you can > simulate the appearance of any color film source provided that the capture > was done at adequate resolution for the print size and you captured at least > the dynamic range that the film captures. stay with small print sizes like > 8x10 and use multiple exposures to capture enough range and the *istD will > do. B&W film is another matter, right now. > > Herb.... > ----- Original Message ----- > From: "John Francis" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, December 25, 2003 12:17 PM > Subject: Re: What do you think? > > > > Technically, of course, it can't. There will always be metamerism issues. > > You can't escape these; the sensor sampled the whole imput spectrum of > light > > falling on it, convoluted it with the response curve of the sensor, and > > reduced the whole thing to a single value. > >
