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function img = pgmread(filename)
% function img = pgmread(filename)
% this is my version of pgmread for the pgm file created by XV.
%
% this program also corrects for the shifts in the image from pm file.
fid = fopen(filename,'r');
if (fid < 0),
error(sprintf('can not find file: %s',filename));
end
fscanf(fid, 'P5\n');
cmt = '#';
while findstr(cmt, '#'),
cmt = fgets(fid);
if length(findstr(cmt, '#')) ~= 1,
YX = sscanf(cmt, '%d %d');
y = YX(1); x = YX(2);
end
end
fgets(fid);
%img = fscanf(fid,'%d',size);
%img = img';
img = fread(fid,[y,x],'uint8');
img = img';
fclose(fid);
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