Histograms

Posted: Tue Sep 11, 2007 10:39 pm

I just want to make sure that what I think is true really is true.

I understand that when looking at a histogram I generally don't want the data to be up against either the right side (over exposure) or left side (under exposure) of the graph.

What about the middle? If the graph of the data goes essentially through the top of the histogram does that represent a problem? I'm thinking it doesn't but I want to be sure.

My basic understanding is that the graph represents how many pixels in the image are in a particular part of the scale. If part of the graph goes through the top of the histogram it doesn't mean any image information is 'lost' like it would at either end. Right? Just more pixels falling into the medium luminosity range? Basically, we can imagine that the histogram can continue upwards indefinately and it wouldn't be a problem?

Joined: 21 Oct 2006 Posts: 350 Location: Ontario, Canada

Your understanding seems in line with what I've read. But, I try to keep my histogram _towards_ the right to acquire as much detail in the image as I can and keep noise to a minimum.