Save matrix as image format file

Hi,

I have a matrix with a 61x89x6 double length. I want to save it as a tiff or another image format file. I've checked the help and I've seen that I have to use the multibandwrite comand but it doesn't work.

This is what I'm doing.

% the matrix creation after some operations

image_output(:,:,1)= yl1;
image_output(:,:,2)= yl2;
image_output(:,:,3)= yl3;
image_output(:,:,4)= yl4;
image_output(:,:,5)= yl5;
image_output(:,:,6)= yl7;

%the comand

multibandwrite(image_output,'image_output.bil','bil');

Am I doing something wrong? Really thanks in advance,

[Jan]

Please explain the details of "it doesn't work" instead of hoping, that we can guess whats going on. Thanks.

Answer 1

[Ashish Uthama]

If you have a current version of MATLAB, the Tiff class provides a way to write multi sample image data.

Note: This is a direct interface to LibTIFF, if you need more help, please look up the link in the code below:

%% Write a 61x89x6 double matrix as a TIFF file

data = reshape(1:61*89*6, [ 61 89 6]);

% pref the TIFF object
t = Tiff('output.tif','w');

% http://www.mathworks.com/help/matlab/import_export/exporting-to-images.html
tags.ImageLength   = size(data,1);
tags.ImageWidth    = size(data,2);
tags.Photometric   = Tiff.Photometric.MinIsBlack;
tags.BitsPerSample = 64;
tags.SampleFormat  = Tiff.SampleFormat.IEEEFP;
tags.RowsPerStrip  = 16;  
tags.PlanarConfiguration = Tiff.PlanarConfiguration.Chunky;

tags.SamplesPerPixel = 6;
unspec               = Tiff.ExtraSamples.Unspecified;
tags.ExtraSamples    = [ unspec, unspec, unspec, unspec, unspec];

t.setTag(tags);
disp(t);
t.write(data);
t.close();
wdata = imread('output.tif');
flag  = isequal(data,wdata);
disp(flag);