Talk:Sobel

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[edit] "Solving"

I'm a university AI student who's done a module in Computational Vision, and still I don't understand the first line: "a discrete differentiation operator solving for the 1st derivatives". What does the "solving" mean?

Well, I think the "solving" is in the algebraic sense, as in "Solve the following equation for x" which basically means "Find the value of x", but I agree that that was a horrible way to start the article, useful only to seasoned mathematicians. I've tried to add a more "general audience" explanation of what the operator actually does. - IMSoP 22:30, 16 December 2005 (UTC)

[edit] Technical Details - Matrix maths wrong way round

Surely the matix maths in the Technical Details section is the wrong way round. The result shown would make Gx and Gy = 0. It should be a 3x1 column * 1x3 row = 3x3 matix.

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