How "preserve luminosity" works?

JP
Posted By
jason.postbox
Jul 31, 2005
Views
4534
Replies
1
Status
Closed
Dear all,

I used Photoshop and there is a "preserve luminosity" in Color Balance function. Anyone knows how the "preserve luminosity" works when e.g. user is adjusting the midtone of the color channels?

Thanks,
J.
Related Tags
how luminosity preserve work

How to Master Sharpening in Photoshop

Give your photos a professional finish with sharpening in Photoshop. Learn to enhance details, create contrast, and prepare your images for print, web, and social media.

NS
Nicholas Sherlock
Jul 31, 2005
wrote:
I used Photoshop and there is a "preserve luminosity" in Color Balance function. Anyone knows how the "preserve luminosity" works when e.g. user is adjusting the midtone of the color channels?

It lightens or darkens the colour so that after changing the colours, the apparent brightness is still the same. Luminosity can be calculated with:

L= 0.299R + 0.587G + 0.114B

(Our eye responds differently to each colour).

Cheers,
Nicholas Sherlock

Master Retouching Hair

Learn how to rescue details, remove flyaways, add volume, and enhance the definition of hair in any photo. We break down every tool and technique in Photoshop to get picture-perfect hair, every time.

Related Discussion Topics

Nice and short text about related topics in discussion sections