Talk:Canny edge detector

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[edit] Differential Edge detection

This section does not seem to fit in an article on the Canny edge detector. In a more general article on edge detection, sure - but not here. Xomex (talk) 00:34, 12 March 2008 (UTC)

The approach of differential edge detection can basically be seen as a reformulation of the Canny edge detector from a differential geometric viewpoint at multiple scales. For this reason, I think it is appropriate to mention it within this article. Nevertheless, I have now replaced the text with a link to the section in the article on edge detection where the differential approach is described in more detail. Tpl (talk) 14:24, 15 March 2008 (UTC)

[edit] Non-maximal suppression

Is there not a step called non-maximal suppression done before the hysteresis step? to be brief, this step deletes pixels normal to the edge direction that are above the gradient of the pixel in question... Cozmoash 18:15, 1 May 2007 (UTC)

There is indeed such a step, and (if I recall correctly) it was one of the novel things about Canny's approach. These pages seem like reasonable references: [1], [2], [3]. --Iknowyourider (t c) 19:38, 18 June 2007 (UTC)
Now, there is a description of the non-maximum suppression stage in the article page. Since I hope that the missing information should have been clarified, I have now removed the tag about disputed article. Tpl
Awesome, thanks! Iknowyourider (t c) 14:50, 18 July 2007 (UTC)

[edit] Proposal to change to "Canny edge detection"

just noticed that there already is an article Canny edge detector which redirects to Canny. I propose to make it the other way: redirect "Canny" to "Canny edge detector" because

  • Canny is not a good name for this article. Although the method described here sometimes is colloquially refered to as "Canny", it is rather the name of the inventor. If I was Canny, I would expect to see a nicly written article about myself. "Canny edge detector" or even "Canny's edge detector" is more descriptive given the content of the article.
  • Changing the title means that we can get rid of the disambiguation stuff in the beginning of the article.

--KYN 22:36, 31 July 2007 (UTC)

Agree with move. Iknowyourider (t c) 05:28, 1 August 2007 (UTC)

I have now made the proposed change, the new location for the article is Canny edge detector. Did not copy this talk page since it appears to be of low relevance to future readers of the article. --KYN 13:49, 3 August 2007 (UTC)

[edit] Recent edits

Did some edits in the article with the following in mind:

  • Removed comment on second derivative is less affected by noise in the "Noise reduction" section. Even if it true (?) it does not appear to be part of the story told in the article.
  • Changed "mask" to "filter". Mask is not described in WP in the meaning of a filter. Also, filter is already used at several places in the article: better to be consistent.