x2pgm.m

支持向量机工具箱

function x2pgm(X,width,height,fname)
% x2pgm(X,fname)
%
% X2PGM write an image from the vector X to the file fname
%  in the PGM format. The vector is supposed to be double
%  and normalized to <0,1>. The arguments width and height
%  determine the shape of the image.
%
% Input:
%  X [size x 1] contains input image of given size.
%  width [1x1] width of the image.
%  height [1x1] height of the image.
%  fname [string] name of the file where the image is to be written.
%
%
% See also PGM2X
%

% Statistical Pattern Recognition Toolbox, Vojtech Franc, Vaclav Hlavac
% (c) Czech Technical University Prague, http://cmp.felk.cvut.cz
% Written Vojtech Franc (diploma thesis)
% Modifications
% 26-feb-2001 V.Franc

fid=fopen(fname, 'w' );

fprintf(fid, 'P5\n');
fprintf(fid, '%d %d\n',width, height );
fprintf(fid, '255\n' );

X=uint8(X*255);

fwrite(fid,X,'uchar');

fclose(fid);

return;