Find points within a region of interest in the point cloud
roi — Region of interest
Region of interest, specified as a six-element vector of form [xmin, xmax, ymin, ymax, zmin, zmax], where:
xmin and xmax are the minimum and the maximum limits along the x-axis respectively.
ymin and ymax are the minimum and the maximum limits along the y-axis respectively.
zmin and zmax are the minimum and the maximum limits along the z-axis respectively.
indices — Indices of stored points
Indices of stored points, returned as a column vector. The vector contains the linear indices of the ROI points stored in the point cloud.
 Muja, M. and David G. Lowe. "Fast Approximate Nearest Neighbors with Automatic Algorithm Configuration". In VISAPP International Conference on Computer Vision Theory and Applications. 2009. pp. 331–340.
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