Tiff import into a matrix becomes integer only

Hello all,

I've modified some code I found online which can quickly import tiff files into matrices in MatLab. Speed is important for me because I have 20 stacks of 1200x1200x250.

The code imports the tiffs just fine, but it is changing the actual pixel values of the data.

Before import the tifs are 8-bit (0-255) but all pixels values lay between 0-5 (with decimal places).

When I important into matlab all the pixel values become whole integers which means I lose all the data since my range is so small.

I have tried changing the data type from uint8, uint16, single and double but this does not solve the issue. I have attached my code below:

files = dir ('*.tif');  % identify all tif files in the current directory 
for j=1:size(files,1)    % this loop extracts info about the tifs, and saves it to a structure array called "files" 
    FileTif= files(j).name; 
    InfoImage=imfinfo(FileTif);
    mImage = InfoImage(1).Width;
    nImage = InfoImage(1).Height;
    NumberImages = length(InfoImage);
    FinalImage=zeros(nImage,mImage,NumberImages,'single');
    TifLink = Tiff(FileTif, 'r');  % it also makes a tiff library which I don't understand - but the internet said this would load them into matlab faster 
    for i=1:NumberImages
        TifLink.setDirectory(i);
        FinalImage(:,:,i)=TifLink.read();% each tiff is read into matlab as an individual 3D matrix - just like a tiff stack 
    end
    FinalImage = single(FinalImage); 
    TifLink.close(); 
files(j).data = FinalImage; % the matrix is then written into the "files" structure array 
end