Hi all
I believe that line 116 of SurfaceInterpolation.cpp should look like this
RegularizedSpline spline(region->points(), tension);
instead of this
RegularizedSpline spline(region->points(), 0.0);
Otherwise f is never passed to TPS and we end up with exact interpolation.
Any thoughts on this?
Regards, Cut.
Last edit: Cutberto 2015-08-24
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f is the tension (or regularization) parameter for TPS. In the MCC paper you used f = 1.5, which I assume worked nicely for forests. I'm working with thorn scrub vegetation and had to use a lower f value (0.15). I also lowered the increment of the curvature threshold to 0.05 for each iteration and relaxed the convergence parameters to 15%, 10% and 1%. So far, this parameters seem to be working for my data.
However, near rivers and other streams, the modified MCC is removing more ground than it should.
Regards, Cut.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi all
I believe that line 116 of SurfaceInterpolation.cpp should look like this
RegularizedSpline spline(region->points(), tension);
instead of this
RegularizedSpline spline(region->points(), 0.0);
Otherwise f is never passed to TPS and we end up with exact interpolation.
Any thoughts on this?
Regards, Cut.
Last edit: Cutberto 2015-08-24
Hi Cut,
What is "f"?
Andy
From: Cutberto [mailto:cparedesmx@users.sf.net]
Sent: Monday, August 17, 2015 12:46 PM
To: [mcclidar:discussion]
Subject: [mcclidar:discussion] (no subject)
Hi all
I believe that line 116 of SurfaceInterpolation.cpp should look like this
RegularizedSpline spline(region->points(), tension);
instead of this
RegularizedSpline spline(region->points(), 0.0);
Otherwise f is never passed to TPS and we end up with exact interpolation.
Any thoughts on this?
Regards, Cut.
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Hi Andy
f is the tension (or regularization) parameter for TPS. In the MCC paper you used f = 1.5, which I assume worked nicely for forests. I'm working with thorn scrub vegetation and had to use a lower f value (0.15). I also lowered the increment of the curvature threshold to 0.05 for each iteration and relaxed the convergence parameters to 15%, 10% and 1%. So far, this parameters seem to be working for my data.
However, near rivers and other streams, the modified MCC is removing more ground than it should.
Regards, Cut.