Fast bilinear image downsampling/upsampling.
Gives similar results to imresize with the bilinear option and
antialiasing turned off, except sometimes the final dims are off by 1
pixel. Inspired by fast downsapmling routine resize.cpp by Deva Ramanan.
USAGE
B = imResample( A, scale )
B = imResample( A, h, w )
INPUT [1]
A - input image (2D or 3D double or uint8 array)
scale - size(B)=size(A)*scale
INPUT [2]
A - input image (2D or 3D double or uint8 array)
h - height(B)=h
w - width(B)=w
OUPUT
B - resampled image
EXAMPLE
I=double(imread('cameraman.tif')); n=100; s=.5;
tic, for i=1:n, I1=imresize(I,s,'bilinear','Antialiasing',0); end; toc
tic, for i=1:n, I2=imResample(I,s); end; toc
figure(1); im(I1); figure(2); im(I2); figure(3); im(abs(I1-I2));
See also IMRESIZE
Piotr's Image&Video Toolbox Version 2.42
Copyright 2010 Piotr Dollar. [pdollar-at-caltech.edu]
Please email me if you find bugs, or have suggestions or questions!
Licensed under the Lesser GPL [see external/lgpl.txt]