def multi_mask(img, *names, **kwargs):
""" Return a list/tuple/generator of masks of an image, one for each unique
label found in a colored img. EVERYTHING DOWN-CONVERTED TO UINT: NECESSARY
FOR MORPHOLOGY.LABELS ANYWAY, ALTHOUGH POSSIBLY SHOULD DO RGB2GRAY OR 255
LABELS IS MAX"""
astype = kwargs.pop('astype', tuple)
ignore = kwargs.pop('ignore', 'black')
names = list(names)
# THIS WILL DRASTICALLY REDUCE NUMBER OF UNIQUE LABELS ALLOWED RIGHT?
# SINCE IT ONLY HAS 255 POSSIBLE VALUES?!
if img.ndim == 3:
img = putil.rgb2uint(img, warnmsg=True)
# Labels requires on grayscale; npunique also doesn't play nice w/ rgb
if ignore == 'black' or ignore == (0,0,0):
ignore = 0
elif ignore == 'white' or ignore == (1,1,1):
ignore = 255
unique = ptools.unique(img)
if ignore not in unique:
logger.warn("Ignore set to %s but was not found on image." % ignore)
else:
unique = [v for v in unique if v != ignore]
names = _parse_names(names, unique)
# Make the mask dict as generator
out = ((str(names[idx]), (img==v)) for idx, v in enumerate(unique))
return putil._parse_generator(out, astype)
def to_masks(self, astype=tuple):
""" Return masks as tuple, list, dict or generator.
Parameters
----------
astype : container type (tuple, list, dict) or None
Return masks in tuple, list etc... if None, generator.
"""
gen_out = ( (self.names[idx], c.pbinary) for idx, c
in enumerate(self.canvii) )
return putil._parse_generator(gen_out, astype)
def transmute(self, attr=None, as_type=tuple):
""" Return a container of names, attributes.
Parameters
----------
attr : str or None
Value to be returned paired to name. Must be valid canvas
attribute, or None to return full canvas.
astype : container type (tuple, list, dict) or None
Return values in tuple, list etc... if None, generator.
"""
if not attr:
gen_out = ( (self.names[idx], c) for idx, c
in enumerate(self.canvii) )
else:
if hasattr(attr, '__iter__'):
raise NotImplementedError("Please select a single canvas"
"attribute or None to return the entire canvas.")
gen_out = ( (self.names[idx], getattr(c, attr)) for idx, c
in enumerate(self.canvii) )
return putil._parse_generator(gen_out, as_type)