how many colors an image has

[ToHelenaHandbasket]

Is there a way, in Photoshop namely, to tell how many colors there are in an image?

Thanks.

[rivux]

Photoshop can't do this out of the box but there are plugins that will do this for you.

http://www.telegraphics.com.au/sw/

These guys have a Count Colours plugin which is free and accurate.

[frogbutt]

You can always decrease color depth until you notice a decrease in quality.

[rivux]

You can always decrease color depth until you notice a decrease in quality.

?? He was asking how to tell hom many colors are in an image, not how to decrease the number of colors.