Black and White

Black and White

When removing color from an element entirely, there is a
huge difference between using the Hue/Saturation effect
and the likely alternatives. Counterintuitively, Hue/Saturation
is typically not the best choice to create a black-andwhite
image because it maintains luminance proportions,
and as was mentioned in a sidebar back in Chapter 6,
that’s not how the eye sees color.

Even if converting an image to black and white is only an
intermediate step, you’re best off doing so either using
the Tint effect at the default settings or a fully desaturated
solid (black, white, or gray, it doesn’t matter) with a Color
blending mode. To really get the conversion right may
involve adjusting or shifting color channels prior to the
color-to-black-and-white conversion.