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Topics - MurrayW

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General / Point Cloud height above ground
« on: March 18, 2019, 11:24:08 AM »

How can I assign height above ground to the MetaShape point cloud?  I have generated a dense point cloud. I have an accurate Lidar DTM. Can I assign DTM value to points? 

In Forestry, LAStools does a process called "normalize" where the ground elevation is subtracted from the Point Cloud elevation so the point cloud represents height above ground - which is the height of trees.  This is an essential step for forestry information from point clouds - can MetaShape produce normalised Point Cloud?


General / Dense Cloud Display colors
« on: February 27, 2019, 02:52:53 AM »

I have a dense point cloud derived from four band imagery. The point cloud is displayed as grey scale. The points have been colorized using Tools/Dense Cloud/Colorize dense cloud. I want to see the color of the points - Can the display of the point cloud be altered to show RGB color?


General / Mask Mesh build
« on: December 13, 2018, 05:37:58 AM »

I am using Photoscan for an aerial photo project. The triangulation results are good, I've created a dense point cloud.

I want to build a mesh and PS reports that it will take 3 days.  But, I only really need a small area.  How do I limit the mesh build to be only a selected area?

I have manually selected points from the dense point cloud using the Model/free-form selection tool, reversed the selection, and deleted those points.  That works, I do get a mesh limited to the area of interest. 

However, I cannot automate that process. 

Can Photoscan:

     - import a shapefile to select points from dense point cloud?
     - use a shapefile to constrain the area for mesh build?

or does someone have a better method?


General / Process four band images
« on: November 30, 2018, 10:23:32 AM »
Hi everyone,

i have some four band tiffs RGBI, and I want to produce four band orthomosaic and point clouds with RGBI colours.  Is this possible in PhotoScan? 

Is the process different to the RGB process?



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