. . . following a request under the 2007 UK Freedom of Information Act Professor Christopher Ramsey has published all the data and photographs for the Shroud of Turin on their website. You can find the photos at: https://archdams.arch.ox.ac.uk/?c=1203&k=1bcdc90a8b. The data and papers are at http://c14.arch.ox.ac.uk/embed.php?File=preprints.php
You can download large TIFF image files. For instance, this image is available in a 2925 x 4300 pixels (12.6 MP) size which translates into 9.8 in x 14.3 in @ 300 PPI.
The paper comprising Supplementary Information for: Nature 337, 611– 615 and Details of chemical cleaning of the Turin samples is interesting.