pcsky: point cloud to raster tools

• pcsky Transform UAV point clouds to hemispherical images to extract Sky View Factor, LAI and other canopy parameters. Point cloud equivalent to CanpoyGapAnalyzer, which was designed for real world images.

• pcrasterize Rasterize pointclouds a long an axis to generate basic orthoimages, DEM and density plots.

The tools currently read large points point clouds provided in PLY format. Colors are supported.

Build

Dependencies:

• miniply (place miniply.h and miniply.cpp in the /src folder)
• libtiff

to build run make (to build tests as well, run make tests afterwards)

Run

pcsky

Provide the following arguments to run the program

./bin/pcsky [pointcloud.ply] c=[X,Y,Z] r=[radius] [outputfilepattern]

The arguments are

• [pointcloud.ply] name of the input pointcloud
• c=[X,Y,Z] camera position (only points above camera Z position will be considered)
• r=[radius] radius of the hemispherical image [in pixels]
• [outputfilepattern] path and basename for the output files

Example

./bin/pcsky foo.ply c=1.0,2.0,-3.0 r=256 ./output/bar

pcrasterize

Provide the following arguments to run the program

./bin/pcrasterize [pointcloud.ply] b=[xmin,xamx,ymin,ymax,zmin,zmax] c=[cellsize] [Axis] [outputfilepattern]

The arguments are

• [pointcloud.ply] name of the input pointcloud
• b=[xmin,xamx,ymin,ymax,zmin,zmax] bounding box (only points above camera Z position will be considered)
• c=[cellsize] cellsize to summarize(in pc units)
• [Axis] axis to project along. Accepted values are X, Y and Z (default).
• [outputfilepattern] path and basename for the output files

Example

./bin/pcrasterize foo.ply b=625250,625680,254040,254450,400,700 c=0.25 Z ./output/bar

Note

This project is under heavy development and may not yet produce stable results.