David's suggestion below is very good if you have many large files as the processing will be really fast. Using VTK you can easily adopt the following approach: 1) Develop a reader for a single file. 2) Extend it to process multiple files e.g. all files in a directory. 3) Develop a GUI to control the process using QT/QVTK - makes selecting files easier. 4) Then you can optionally write extra code to control what parts of the point cloud are selected. The GUI can then be used to control your selection parameters.
This is really useful if you have point clouds corresponding to some time span e.g. laser scans of a mine pit, as you can ultimately animate the data using ParaView. Andrew >>> I have been working with 3D stereo reconstruction. So, I have huge 3d point >>> clouds co-registered with color in this format [X Y Z R G B] (the first >>> three vector columns specify the location of the single point and the last >>> three one its color in RGB space). I have been trying to display the data >>> in Paraview without success. >>> >>> >>> >>> I use the “table to points” filter to show the 3D coordinates but then I do >>> not know how to specify the color of each single point using its RGB >>> components. Can you please help me out? > > If you're more comfortable in c++ you could use VTK to parse the file, > construct a polydata, and then write a vtp file. Here are the examples > you'd need: > http://www.vtk.org/Wiki/VTK/Examples/Cxx/InfoVis/ReadDelimitedFile > http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/WriteVTP > > Then Paraview can easily read this vtp file. > > David > > -- ___________________________________________ Andrew J. P. Maclean ___________________________________________ _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
