Topics

1

Bug Reports / Ghost points in Mesh from Dense Point Cloud

« on: April 09, 2015, 06:58:47 AM »

Hi All,
I recently produced a Mesh from a Dense Point Cloud.  Before producing this mesh i had deleted parts of the Dense Cloud that wouldn't be required in the mesh.  However when i created the mesh photoscan still created points for the mesh where the  Dense Cloud had been deleted. 
I thought that since i was creating the Mesh from the Dense Point Cloud that i would only get a mesh where there was points.
I have included photos to illustrate the problem

2

General / Control Density and Resulting Errors

« on: September 18, 2014, 08:01:49 AM »

Hi Everyone

I have been doing some testing of control placement to see see how it affects surface models. 
Attached is an isopac of Surface A and Surface B.  The red dots are my control marks, placed by RTK GPS.  Surface A used all the control marks and Surface B only used the ones in the corners.  As you can see in some places the differences are around 200mm, I was expecting the two surfaces be a lot closer than this. 

I am aware that some of this area is outside my control, but i am only interested in the area within my control area, I have left this in purely for interests sake. 

Processing stats ETC.
Area Description - Flat paddock with trees around the outside
Photos - 524
Resolution - 24 MP
Alignment - Medium, 15,000 point limit
Control - Added all markers, optimized, tweaked points and optimized again
Dense Point Cloud - Medium, Aggressive depth filtering
Mesh - LOW from dense point cloud

Does anyone know what is causing this or have come across this before?

Cameron