get_feature_lines.m

matlab source code for image morphing..

function featLines = get_feature_lines(im1, im2, N, feats) 
% 
% Input: 
%   i0 -- Filename for Image 0 
%   i1 -- Filename for Image 1 
%   N  -- Number of lines to select 
%   feats -- Features already selected (optional) 
% Output: 
%   featLines -- Matrix for selected feature lines 
 
figure(1); clf; imshow(im1); hold on; zoom off; ax1 = axis; 
figure(2); clf; imshow(im2); hold on; zoom off; ax2 = axis; 
figure(1); 
hold on 
color = [0 1 1]; 
if nargin == 3 
    featLines = []; 
    start = 1; 
 
elseif nargin == 4 
    start = size(feats,1); 
    featLines = feats; 
    for i=1:start 
        figure(1); 
        p1 = featLines(i,1:2,1); 
        p2 = featLines(i,1:2,2); 
        format_figure(p1(2),p1(1),color,i); 
        format_figure(p2(2),p2(1),color,i); 
        line([p1(2) p2(2)],[p1(1) p2(1)], 'Color', color); 
 
        figure(2); 
        p1 = featLines(i,1:2,3); 
        p2 = featLines(i,1:2,4); 
        format_figure(p1(2),p1(1),color,i); 
        format_figure(p2(2),p2(1),color,i); 
        line([p1(2) p2(2)],[p1(1) p2(1)], 'Color', color); 
         
    end 
    start = start+1; 
end; 
 
figure(1); 
 
for i=start:N 
         
        figure(1); 
        title('Choose a line in this view'); 
        [x,y,button] = ginput(1); 
        format_figure(x,y,color,i); 
        [x1,y1,button] = ginput(1); 
        format_figure(x1,y1,color,i); 
        line([x x1],[y y1], 'Color', color); 
         
        featLines(i,1:2,1) = [y x]; 
        featLines(i,1:2,2) = [y1 x1]; 
         
         
        figure(2); title('Choose a line in this view'); 
 
        [x,y,button] = ginput(1); 
        format_figure(x,y,color,i); 
        [x1,y1,button] = ginput(1); 
        format_figure(x1,y1,color,i); 
        line([x x1],[y y1], 'Color', color); 
        featLines(i,1:2,3) = [y x]; 
        featLines(i,1:2,4) = [y1 x1]; 
 
end 
hold off 
 
% 
%I = getframe(gca); 
%imwrite(I.cdata, 'test.jpg'); 
%------------------------------------------------------------------------------------------ 
function format_figure(x,y,color,c); 
h = plot(x, y,'ro'); 
set(h,'MarkerSize', 5); 
set(h,'LineWidth', 2);    
set(h,'Color', color); 
H = text(x+4, y+4,int2str(c)); 
set(H,'Color',color) 
set(H,'FontSize',10)