If the string does not contain any of the special caracters (FS, GS, RS and US), then it's a URI path. If the file does not exists, the function read() will raise a IOError Exception

Change the NIST.data variable from defaultdict to RecursiveDefauldDict (allowing to assign a value to an non-existing type directly)

If the minutiae are not present in the NIST object, the returned image is the latent image without any annotations

Join the functions set_horizontalResolution and set_vertivalResolution in the set_resolution function (never used alone)

If the core is passed in argument, the coordinates have to be transformed from mm to px and flipped up-side-down (NIST coordinates to PIL coordinates)

Patch the check for the input string : if the string is the dump of a NIST object (NIST().dump() or open( 'file.nist', 'rb' ).read()), it will contain a FS, GS, RS or US character)

Bug fix : Set the coordinates of the centre in px to int (consequence of the commit 71d8431d regarding the future division operator)