experiment.m

一个薄板样条模型（thin plate spline）matlab源代码

% Load in some data
scale = 1;
ipts = load('Data/Picture3.pts');
%ipts = ipts.ipts;
opts = load('Data/Picture2.pts');
%opts = opts.opts;
img = imread('Data/Picture3.jpg');
ipts = ipts*scale;
opts = opts*(scale*1);
img = imresize(img, scale);


% Perform the TPS warp
[wimg, w, a] = TPS_im_warp(img, opts, ipts);

% Make a mesh of the inverse warp. The calculation of image pixels is done
% using the forward warp.
% Number of grid elements along x and along y
N = 50;
[grid_x, grid_y] = meshgrid(1:size(img,1)/N:size(img,1), 1:size(img,2)/N:size(img,2));
[w, a, K] = pts2TPS_param(ipts, opts);
tps = psi_tps([grid_x(:), grid_y(:)], a, w, opts);
wgrid_x = reshape(tps(:,1), size(grid_x,1), size(grid_x,2));
wgrid_y = reshape(tps(:,2), size(grid_y,1), size(grid_y,2));

%Display the Data
close all;
figure(1);
iptsetpref('ImshowBorder', 'tight')
M = 3;
N = 2;
I = 1;
%%
%
%%
subplot(M, N, I, 'align'); I = I+1;
% subaxis(M,N,I,'SpacingHoriz',0, 'MR',0); I = I+1;

im1 = imread('Data\Picture3.jpg');
imagesc(im1); hold on;
plot(ipts(:,1), ipts(:,2), 'rd');
axis image ij;
title('Base Image and Base Points');
%%
%
%%
subplot(M, N, I, 'align'); I = I+1;
% subaxis(M,N,I,'SpacingHoriz',0,'MR',0); I = I+1;

im1 = imread('Data\Picture2.jpg');
imagesc(im1); hold on;
plot(opts(:,1), opts(:,2), 'rd');
axis image ij;
title('Target Image and Target Points');

%%
%
%%
subplot(M, N, I, 'align'); I = I+1;
% subaxis(M,N,I,'SpacingHoriz',0,'MR',0); I = I+1;
g = sqrt((grid_x - wgrid_x).^2 + (grid_y - wgrid_y).^2);
surf(wgrid_x, wgrid_y, g);
view(2);
axis image ij;
title('Warped Thin Plate');

%%
%
%%
subplot(M, N, I, 'align'); I = I+1;
% subaxis(M,N,I,'SpacingHoriz',0,'MR',0); I = I+1;

g = sqrt((grid_x - grid_x).^2 + (grid_y - grid_y).^2);
surf(grid_x, grid_y, g);
view(2);
axis image ij;
title('Original Thin Plate');

%%
%
%%
subplot(M, N, I, 'align'); I = I+1;
% subaxis(M,N,I,'SpacingHoriz',0,'MR',0); I = I+1;

hold on;
imagesc(img); colormap gray;
plot(ipts(:,1), ipts(:,2), 'rd');
axis image ij;
title('Base Image and Base Points');

%%
%
%%
subplot(M, N, I, 'align'); I = I+1;
% subaxis(M,N,I,'SpacingHoriz',0,'MR',0); I = I+1;

hold on;
imagesc(wimg);
plot(opts(:,1), opts(:,2), 'rd');
axis image ij;
title('Base Image and Target Points');

 colormap jet;