Opening multileveled TIFF images in Matlab

 The issue: this is a simple issue. I generally open single-leveled TIFF files in Matlab by simply using the function:

  data = imread('example.tif');

However, if the tif file in question is multi-layered (3D), this command will only open the top layer and ignore the rest. 


Solution: There are two possible solutions for this problem.

1. Using only one command (tested in MatLab R2023, documentation refers to being first released with R2020b):

     data  = tiffreadVolume('example.tif');

The numerical array data will therefore have 3 dimensions (x,y,z). I got it automatically in the format uint8 when I tried. Between the two solutions, this one is the fastest.


2. Using multiple lines (maybe for versions prior to MatLab R2020b): 

    info = imfinfo('example.tif');

  data = zeros(info(1).Width,info(1).Height,numel(info)); %preallocates the data array.

  data = uint8(data); %converts the array from double to uint8 (or uint16, if chosen).

  for i = 1:numel(info)

    data(:,:,i) = imread('example.tif',i);

  end

You get the same result as method 1. The variable info will be a structure with the same number of elements as the number of layers present in the tif file. 



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