www.pudn.com > MatlabSIFT.zip > plotpoints.m

%///////////////////////////////////////////////////////////////////////////////////////////// 
% 
% plotpoints - visualize features generated by detect_features 
% Usage:  plotpoints(p,img,num_flag) 
% 
% Parameters:   
%             
%            img :      original image 
%            p:         vector of points 
%            numflag :  0 - plot with crosshairs    1-plot with number index 
% 
% Returns:   nothing, generates figure 
% 
% Author:  
% Scott Ettinger 
% scott.m.ettinger@intel.com 
% 
% May 2002 
%///////////////////////////////////////////////////////////////////////////////////////////// 
 
function [] = plotpoints(p,img,num_flag) 
 
if ~exist('num_flag') 
    num_flag = 0; 
end 
 
figure(gcf) 
imagesc(img) 
hold on 
colormap gray 
 
for i=1:size(p,1) 
    x = p(i,1); 
    y = p(i,2); 
     
        
    if num_flag ~= 1 
        plot(x,y,'g+');         %draw box around real feature 
    else 
        plot(x,y,'g+');  
        text(x,y,sprintf('%d',i),'color','m'); 
    end 
         
end 
 
hold off;