https://www.cloudcompare.org/doc/wiki/index.php?action=history&feed=atom&title=Closest_Point_SetClosest Point Set - Revision history2026-05-10T11:50:22ZRevision history for this page on the wikiMediaWiki 1.44.0https://www.cloudcompare.org/doc/wiki/index.php?title=Closest_Point_Set&diff=46695&oldid=prevDaniel: /* Description */2015-02-20T11:03:16Z<p><span class="autocomment">Description</span></p>
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This tool is accessible via the 'Tools > Distances > Closest Point Set' menu.<br />
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= Description =<br />
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This tool computes 'closest point set' of a cloud relatively to another one. This structure is defined for instance by Besl et al. in the original ICP article.<br />
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Let ''A'' and ''B'' be two clouds with respectively N<sub>A</sub> and N<sub>B</sub> points.<br />
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The closest point set of ''A'' relatively to ''B'' (''CPSet<sub>B</sub>(A)'') is the set of points from the ''B'' cloud that are closest to each point of ''A''.<br />
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This set has N<sub>A</sub> points which all come from the ''B'' cloud. Moreover, the points of ''B'' can be duplicated several times in the output set as they can be the 'closest' for different points of the ''A'' cloud.<br />
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= Procedure =<br />
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To launch this tool the user must select two clouds (and only two).<br />
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Then the user must choose which cloud will be the ''A'' cloud (equivalent to the 'Compared' cloud when computing distances at each ICP registration iteration - as this is where this concept is used) and which cloud is the ''B'' cloud (equivalent to the 'Reference' cloud).<br />
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[[File:Cc_cpset_dialog.jpg|center]]<br />
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CloudCompare will then compute the closest point set and add it (as a new cloud) to the DB tree. The ''Reference/B'' cloud will be hidden (as the closest point set will be a subset of it and therefore it wouldn't be visible).<br />
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Warning: as stated above, this cloud may have duplicate points.</div>Daniel