showcorners.m

machine vision 工具箱

%SHOWCORNERS	Overlay corner features on image
%
%	[X,Y] = SHOWCORNERS(c, n)
%	SHOWCORNERS(c, n)
%
%	Returns the coordinates of the N strongest corners in the corner
%	image C.
%	The second form overlays a white square at the location of the N 
%	strongest corners.  
%
% SEE ALSO:	iharris
%
%	Copyright (c) Peter Corke, 1999  Machine Vision Toolbox for Matlab

function [x,y] = showcorners(cp, n)
	if nargin == 1,
		n = 10;
	end

	[nrows,ncols] = size(cp);

	[z,i] = sort(cp(:));
	i = head(i, n);

	c=floor(i/nrows)+1;
	r=rem(i,nrows)+1; 

	if nargout == 2,
		x = c;
		y = r;
	else
		hold on
		plot(c, r, 'sw')
		hold off
	end