Auto-Level Versus Auto-Contrast

Ask for help and post your question on how to use XnView MP.

Moderators: XnTriq, xnview

Post Reply
mgilbert
Posts: 2
Joined: Mon Feb 04, 2019 9:32 am

Auto-Level Versus Auto-Contrast

Post by mgilbert » Mon Feb 04, 2019 9:36 am

What is the difference between the Auto-Level and Auto-Contrast commands??? What does each actually do?

User avatar
xnview
Author of XnView
Posts: 31887
Joined: Mon Oct 13, 2003 7:31 am
Location: France
Contact:

Re: Auto-Level Versus Auto-Contrast

Post by xnview » Mon Feb 04, 2019 11:46 am

'Auto levels' try to expand the histogram of intensity
'Auto contrast' apply brightness/contrast following histogram
Pierre.

mgilbert
Posts: 2
Joined: Mon Feb 04, 2019 9:32 am

Re: Auto-Level Versus Auto-Contrast

Post by mgilbert » Mon Feb 04, 2019 12:41 pm

xnview wrote:
Mon Feb 04, 2019 11:46 am
'Auto levels' try to expand the histogram of intensity
'Auto contrast' apply brightness/contrast following histogram
I understand how auto-contrast works - it finds the brightest and darkest points in a photo, and sets them to a brightness of 0% and 100%

I'm sorry, but I still don't understand what auto-level does. I've never heard of an "intensity' adjustment. Could you explain further?

Thanks...

Post Reply