KernelFilter coefficients

[Carlos Milovic]

Here is a doubt about setting and reading a specifical coefficient in a KernelFilter object.

Let's say that the inner matrix is defined like "coefficients

• [y]". How do I read that specific value? Do I have to use Coefficients() and get the whole matrix?

What if I want to change that specific value (i.e. coefficients

• [y] = value)? Do I have to create the propper matrix, and then use the "=" operator to set it?

[Juan Conejero]

KernelFilter does not allow you to write kernel filter coefficients. You must work with a FMatrix, then create a KernelFilter from it. For example:

Code: [Select]

#include <pcl/KernelFilter.h>

FMatrix M( .0F, 5, 5 ); // a matrix of float elements, 5 rows and 5 columns, initialized with zeros
M[2][2] = 1; // set the central element to 1
M[1][1] = M[1][2] = M[1][3] = // now set its surrounding elements to 1/2
M[2][1] = M[2][3] =
M[3][1] = M[3][2] = M[3][3] = 0.5;
KernelFilter F( M ); // convert matrix coefficients into a filter

[Carlos Milovic]

ok... That's the reason I was using my own class
Back to an earlier version... today I modified everything to use KernelFilter, with that detail the only pending thing I'll return to my own kernel, using FMatrix instead of the matrix I had defined and simplifying the code a bit. Cross fingers.