基于Matlab实现Harris角点特征检测项目（源码）.rar

function varargout=harris(I,k,q,h) narginchk(0,4); nargoutchk(0,2); if nargin<1 I=checkerboard(50,2,2); end if nargin<2 k=0.04; end if nargin<3 q=0.01; end if nargin<3 h=fspecial('gaussian',[5 5],1.5); end fx=[-2,-1,0,1,2]; Ix=filter2(fx,I); fy=[-2,-1,0,1,2]'; Iy=filter2(fy,I); Ix2=filter2(h,Ix.^2); Iy2=filter2(h,Iy.^2); Ixy=filter2(h,Ix.*Iy); rfcn=@(a,b,c)(a*b-c^2)-k*(a+b)^2; R=arrayfun(rfcn,Ix2,Iy2,Ixy); R(R < q*max(R(:)))=0; [xp,yp]=find(imregionalmax(R,8)); if nargout==0 subplot(121) imshow(I); hold on; plot(xp,yp,'ro'); title('自己编写HARRIS算法') subplot(122) cp=corner(I); imshow(I) hold on plot(cp(:,1),cp(:,2),'ro'); title('MATLAB自带CORNER函数') elseif nargout==1 varargout={[xp,yp]}; elseif nargout==2 varargout={xp,yp}; end