The Point Cloud Library (or PCL) is a large scale, open project for 2D/3D
image and point cloud processing. The PCL framework contains numerous 
state-of-the art algorithms including filtering, feature estimation, 
surface reconstruction, registration, model fitting and segmentation. 
These algorithms can be used, for example, to filter outliers from noisy 
data, stitch 3D point clouds together, segment relevant parts of a scene, 
extract keypoints and compute descriptors to recognize objects in the 
world based on their geometric appearance, and create surfaces from point 
clouds and visualize them -- to name a few.

Optional dependencies:

Available on SlackBuilds: - qhull, cudatoolkit
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Not yet available on SlackBuilds:
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OpenNI - enables OpenNI grabber support
https://github.com/OpenNI/OpenNI ; http://structure.io/openni

OpenNI2 - enables OpenNI2 grabber support
https://github.com/OpenNI/OpenNI2 ; http://structure.io/openni

FZAPI - enables fotonic camera support

ensenso - enables IDS-Imaging Ensenso camera support
http://www.ensenso.com/support/sdk-download/

davidSDK - enables David Vision Systems SDK support
- official http://www.david-3d.com/en/support/downloads
- free fork https://github.com/InstitutMaupertuis/davidSDK

Depth Sense SDK (DSSDK) - enables DepthSense SDK support
https://github.com/huningxin/DSSDK

RealSense SDK (RSSDK) - enables RealSense SDK support
https://github.com/IntelRealSense/realsense_sdk