USPS2MAT |
converts USPS database to Matlab data file (MAT).
Description:
It creates MAT-file containing training and testing part
of the USPS database of handwritten numerals.
Input:
It requires input text files "zip.test" and "zip.train"
which can be downloaded from:
http://www-stat-class.stanford.edu/~tibs/ElemStatLearn/datasets/zip.train.gz
http://www-stat-class.stanford.edu/~tibs/ElemStatLearn/datasets/zip.test.gz
Output:
The output MAT-file "usps.mat" contains:
trn.X [256 x 7291] Images of training numerals stored as columns.
trn.y [1 x 7291] Labels y==1 -->"1", ..., y==9-->"9",... y==10-->"0".
tst.X [256 x 2007] Images of testing numerals stored as columns.
tst.y [1 x 2007] Labels.
Example:
The following code displays the first training image.
load usps.mat;
img = reshape(trn.X(:,1),16,16);
figure;
imshow(img,[]);
About: Statistical Pattern Recognition Toolbox
(C) 1999-2003, Written by Vojtech Franc and Vaclav Hlavac
Czech Technical University Prague
Faculty of Electrical Engineering
Center for Machine Perception
Modifications:
07-jun-2004, VF
10-mar-2004, VF