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Tom.Reding (talk | contribs) m Remove unknown param from WP Robotics: past-selected |
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{{WikiProject
{{WikiProject Robotics|importance=mid|attention=no}}
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==Error on 3D structure tensor image==
It seems that there is a little confusion between the images for the 3D structure tensor. The description for the surfel image seems wrong, with the egein value relation being the one for the line, and conversly for the line below. The ellipsoid images of the right seems also messed up, or am I missing something ? <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/185.116.129.142|185.116.129.142]] ([[User talk:185.116.129.142#top|talk]]) 14:59, 24 March 2023 (UTC)</small> <!--Autosigned by SineBot-->
==Conceptual Explanation Request==
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: Thanks -- I had trouble proving out the rotational transformation but I've got it now. Rotation invariance should be noted in the article, though I obviously lack the expertise to work on it. <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/132.3.33.79|132.3.33.79]] ([[User talk:132.3.33.79|talk]]) 20:09, 1 October 2013 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->
: The rotation transformation relies on the Gaussian kernel (called w in the article) being circular symmetric, something that is not mentioned in the intial definition of the structure tensor in the aricle. --[[User:KYN|KYN]] ([[User talk:KYN|talk]]) 20:23, 1 October 2013 (UTC)
== Possible error in equation? ==
Is there an incorrect equation in the section Complex Version?
The expression of <math>\lambda_2</math> (in terms of <math>\kappa_{20}</math> and <math>\kappa_{11}</math>) seems incorrect to me:
In my opinion it should be:
<math display="block">(|\kappa_{20}|-\kappa_{11})/2=\lambda_2</math>
instead of
<math display="block">(\kappa_{20}-|\kappa_{11}|)/2=\lambda_2</math>
as is stated there. <!-- Template:Unsigned --><small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Cocus|Cocus]] ([[User talk:Cocus#top|talk]] • [[Special:Contributions/Cocus|contribs]]) 11:52, 26 February 2018 (UTC)</small> <!--Autosigned by SineBot-->
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