On Sat, 02 Feb 2002 02:34:19 -0800 Arthur Entlich ([EMAIL PROTECTED]) wrote:
> 1) In the case of a film scanner, if one sets the scanner driver to > black and white film, and it scans in greyscale, is there a standard > method this is accomplished? I don't know, but have come across scanner s/w which uses only one channel, or even gives you a choice of which channel to use. It was messing about with the latter, on an AVR scanner (now defunct - but was a high end flatbed c.95) which convinced me that scanning RGB then converting or dumping the colour info was preferable. There are umpteen different ways of losing the colour, eg desaturate; convert to LAB and just use the L channel, or just use one of the RGB channels (separations) in PS, or ..or..or . I don't think it matters with greyscale originals, apart from noise issues. Converting a colour original to greyscale is a whole different ballgame, as messing with the proportion of R, G or B has the same sort of effect as coloured filters with monochrome film - eg the red channel looks pseudo-IR, you can darken skies by reducing the contribution the blue channel makes, etc. Regards Tony Sleep http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner info & comparisons ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
