<type> pcfilter(int handle, string channel_name, ...)
Filters the points queued up by pcopen using a simple reconstruction filter.
This function is roughly equivalent to:
float pcfilter(int handle; string channel) { float sum, w, d; float value, result = 0; while (pciterate(handle)) { pcimport(handle, "point.distance", d); pcimport(handle, channel, value); w = 1 - smooth(0, radius, d); sum += w; result += w * value; } result /= sum; return result; }
pcfilter takes the points that were opened by the point cloud and produces a filtered value. The following equation shows how the individual points are weighted.
w_i = 1-smooth(0, maxd*1.1, d_i);
maxd is the farthest point, and w_i is the weight for a given point at distance (d_i). Points that are closer to the center will be weighted higher with that formula, rather than it being an average.
| See also | |
| ptcloud |
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