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Author Topic: Mild filtering filter more than moderate filtering  (Read 3132 times)

Bruno Andrieu

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Mild filtering filter more than moderate filtering
« on: March 26, 2014, 11:07:53 PM »
I generated a model of a pot containing wheat plants. With the same images I generated point clouds with several accuracy (ultra high, high, medium) and compared between mild and moderate filtering.

I observe consistently that dense points clouds generated with moderate filtering have more points than dense point clouds generated with mild filtering. Moreover these extra points are often artefacts. I expected  the opposite behavior . Is there an explanation?

Attached are capture showing the pont clouds generated with "ultra high" accuracy and mild or moderate filtering.
The yellow margins around the leaves (specially in moderate filtering) are artefact coming from the soil background.  They are more of them in "moderate" than in "mild". You can also see that the sides of the pot, which lacks good texture, have been eliminated with "mild" but not with "moderate" filtering. So I am confused by this.
BTW : what would be the best method to avoid the margins coming from background ?

Bruno