ImageFile.harden_mask

ImageFile.harden_mask()

Force the mask to hard, preventing unmasking by assignment.

Whether the mask of a masked array is hard or soft is determined by its ~ma.MaskedArray.hardmask property. harden_mask sets ~ma.MaskedArray.hardmask to True (and returns the modified self).

ma.MaskedArray.hardmask ma.MaskedArray.soften_mask