save images as tif 32 bits by using imwrite

Hi;

I'm trying to save my images as tif 32 bits but I got this Error:

Cannot write uint32 data to a TIFF file

this is my code:

for K=1:10

    Id{k} = waverec2(t_C,L,'sym8');
    filename= ['C:\Path \Id_number_' num2str(k) '.tif'];
    Id{k}=uint32(Id{k});
    imwrite(Id{k},filename);

end

I need to save my images as tif 32 bits :/ have you any idea?

Thank you in advance

Answer 1

[Andreas Goser]

There is something in recent release called TIFF Class. Can you tell me if this meets your needs? Documentation here.

[Soum]

Thanks Mr.Andreas But tif or Tiff unit32 still not working I want the output my images as 32 bits :/ what can I do? Cannot write uint32 data to a TIFF file

Answer 2

[Ashish Uthama]

Soum, did you click on the documentation link? Andreas was talking about the Tiff class, which is a different interface than IMWRITE.

Here is how you can use the Tiff class:

%
% Start with:
% http://www.mathworks.com/help/matlab/import_export/exporting-to-images.html#br_c_iz-1

data = uint32(magic(10));

This is a direct interface to libtiff

t = Tiff('myfile.tif','w');

% Setup tags
% Lots of info here:
% http://www.mathworks.com/help/matlab/ref/tiffclass.html
tagstruct.ImageLength     = size(data,1);
tagstruct.ImageWidth      = size(data,2);
tagstruct.Photometric     = Tiff.Photometric.MinIsBlack;
tagstruct.BitsPerSample   = 32;
tagstruct.SamplesPerPixel = 1;
tagstruct.RowsPerStrip    = 16;
tagstruct.PlanarConfiguration = Tiff.PlanarConfiguration.Chunky;
tagstruct.Software        = 'MATLAB';
t.setTag(tagstruct)

t.write(data);
t.close();
d = imread('myfile.tif');
disp(class(d));
assert(isequal(d,data))