Talk:Otsu's method

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Contents 1 Minor changes, also reffered to as ... 2 A Better Description 2.1 INCORRECT PSEUDO CODE 2.2 MATHEMATICAL REPRESENTATION OF OSTU'S CODE? 3 Is it known as Ad-hoc?

[edit] Minor changes, also reffered to as ...

In the first line it reads "... Otsu method ..." Shouldn't it be "Otsu's Method"? or "the Otsu method" also, the article is not found if you search for otsu's algorithm. ive seen it reffered to as such in a book and a few articles as both otsu's algorithm and otsu's method. someone should probably address this
Pikez33Albert Cruz 03:29, 12 June 2008 (UTC)

I'v changed from Category:Computer vision to Category:Computer vision stubs since this articles needs mora material to make it readable.--KYN 07:01, 22 March 2006 (UTC)

[edit] A Better Description

I thought this was a good description from the web - since the actual paper by Otsu is pre-internet:

http://sampl.ece.ohio-state.edu/EE863/2003/ee863-9.ppt

The thresholds are exhaustively searched (there are only 254 possible for greyscale images). For each threshold, Otsu aims to minimize variance*probability of points less than threshold + the variance*probability of the remaining points. This minimizes within-class variance, and maximizes between-class variance.

In practice the variances are not actually computed, because a marginally more efficient incremental method was suggested by Otsu.

I changed the description so that it is clear that variances are not computed. --Tomash (talk) 22:10, 16 February 2008 (UTC)

[edit] INCORRECT PSEUDO CODE

This pseudo code has nothing to do with Otsu's Method

This method's describes the iterative method to obtain the ideal threshold by Gonzalez and Woods [2002].

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Pseudo code is an example of K-mean method... not Otsu's

Pseudo-code now reflects what I think is Otsu's algorithm. --Tomash (talk) 22:10, 16 February 2008 (UTC)

[edit] MATHEMATICAL REPRESENTATION OF OSTU'S CODE?

this article seems to focus on otsu's method being used only in cases when there is a foreground and background. also, there is a mathematical representation of otsu's method

I am currently a student at UC Riverside with some expertise in computer vision, and will try to improve this article

Albert Cruz 22:28, 8 August 2007 (UTC)

[edit] Is it known as Ad-hoc?

Does anybody know if this method is known also as Ad-hoc algorithm. I do not think so, and the name seems weird to me, if nobody complains I will remove this. --Tomash (talk) 22:04, 16 February 2008 (UTC)

Removed. --Tomash (talk) 16:54, 1 April 2008 (UTC)