On Dec 27, 2005, at 12:32, Dario Bonazza wrote:

Good point, hence I'm no longer sure of my previous idea. On the contrary, I'm afraid you are right and I need someone else's help now: can we take for granted that any pixel is always present within the histogram?


Probably... but you have to remember that the histogram is a distribution graph. If there are only one or two "full white" pixels, they are not going to make a big tall line on the right-hand side. You need a fair number of pixels (I'm dodging the question here, as I don't know really HOW many are required) to get a noticeable line to show at a specific point on the graph.

 -Charles

--
Charles Robinson
[EMAIL PROTECTED]
Minneapolis, MN
http://charles.robinsontwins.org

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