compute_stick_tf.m

张量投票在matlab环境下的仿真。球型张量及棒型张量的仿真

function T = compute_stick_tf(v,N,n,sigma,c)

% compute_stick_tf - compute the voting kernel of a stick tensor.
%
%   T = compute_stick_tf(v,n,N,sigma,c);
%
%   'v' is the non-null eigenvector of the stick tensor (i.e. the tensor is v*v').
%   'N' is the total size of the image (supposed to lie in [0,1]x[0,1]).
%
%       The equation for the decay of the field is
%           DF(s,k) = exp(-(s^2+c*k^2)/sigma^2)
%       where 's' is the length of the circle that joins
%       the two points, and 'k' is its curvature.
%
%   Optional:
%   'sigma' control the scale of the voting field.
%   'c' control the ratio between distance and curvature.
%       The higher 'c' is, the narrower the field will be.
%   'n' is the size of the kernel (should be odd).
%
%   See also compute_stick_ball.
%
%   Copyright (c) 2004 Gabriel Peyr