You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.3 KiB
47 lines
1.3 KiB
function saveasppm(x, filename, K)
|
|
%saveasppm encodes an image as PPM and saves it to the disk
|
|
% Usage saveasppm(x, filename, K), where:
|
|
% Inputs
|
|
% - x is the input image
|
|
% - filename is the path and filename of the file where the resulting
|
|
% PPM image is going to be saved
|
|
% - K is the maximum value of brightness
|
|
|
|
file = fopen(filename, 'wt+');
|
|
|
|
fwrite(file, 'P6');
|
|
fwrite(file, ' ');
|
|
fwrite(file, int2str(size(x.red, 1)));
|
|
fwrite(file, ' ');
|
|
fwrite(file, int2str(size(x.red, 2)));
|
|
fwrite(file, ' ');
|
|
fwrite(file, int2str(K));
|
|
fwrite(file, newline);
|
|
|
|
if K < 256
|
|
precision = 'integer*1';
|
|
precisionBytes = 1;
|
|
machinefmt = 'l';
|
|
else
|
|
precision = 'integer*2';
|
|
precisionBytes = 2;
|
|
machinefmt = 'b';
|
|
end
|
|
|
|
for row = 1:size(x.red, 1)
|
|
for column = 1:size(x.red, 2)
|
|
fwrite(file, x.red(row, column), precision, machinefmt);
|
|
fwrite(file, ' ');
|
|
fwrite(file, x.green(row, column), precision, machinefmt);
|
|
fwrite(file, ' ');
|
|
fwrite(file, x.blue(row, column), precision, machinefmt);
|
|
fwrite(file, ' ');
|
|
end
|
|
end
|
|
|
|
% combined = B(:,[1;1]*(1:size(B,2)));
|
|
% combined(:,1:2:end) = A;
|
|
|
|
fclose(file);
|
|
end
|
|
|
|
|