Can anyone tell me what formula PhotoShop uses to convert
RGB files to Grayscale? I have dumped a RGB file and a Mode
converted grayscale file and compared the values. The
grayscale results do not seem to fit the PhotoShop Luminosity
formula red * .30 + green * .59 + blue * .11 or the
standard NTSC formula red * .299 + green * .587 + blue * .114 .
Any help appreciated.