def get_slice(stack, pos):
""" Returns a slice index for an image stack. Which one
is determined by pos. This can either be an integer index
or the string "first", "center" or "last".
"""
num_slices = stack.dimension.z
# Just return if we got no stacks at all
if num_slices == 0:
return None
# Check the type of the position informaiton
pos_type = type(pos)
#return str(pos_type)
if is_string_type(pos_type):
if pos == "first":
return 0
elif pos == "center":
return int(num_slices / 2)
elif pos == "last":
return num_slices - 1
elif pos_type == int:
# Make sure we are in bounds
if pos >= 0 and pos < num_slices:
return pos
# Return None if nothing else matched
return None
def get_slice(stack, pos): """ Returns a slice index for an image stack. Which one is determined by pos. This can either be an integer index or the string "first", "center" or "last". """ num_slices = stack.dimension.z # Just return if we got no stacks at all if num_slices == 0: return None # Check the type of the position informaiton pos_type = type(pos) #return str(pos_type) if is_string_type( pos_type ): if pos == "first": return 0 elif pos == "center": return int(num_slices / 2) elif pos == "last": return num_slices - 1 elif pos_type == int: # Make sure we are in bounds if pos >= 0 and pos < num_slices: return pos # Return None if nothing else matched return None
def filter_stacks(stacks, pos):
""" Returns a list of filtered stacks according to the
pos parameter. This list can contain all stacks (pos is
"all"), a specific stack (pos is a number), the first or
the last stack (pos is "first" or "last").
"""
if is_string_type(type(pos)) and pos == "all":
return stacks
else:
s = get_stack(stacks, pos)
if s is None:
return []
else:
return [s]
def filter_stacks(stacks, pos):
""" Returns a list of filtered stacks according to the
pos parameter. This list can contain all stacks (pos is
"all"), a specific stack (pos is a number), the first or
the last stack (pos is "first" or "last").
"""
if is_string_type( type(pos) ) and pos == "all":
return stacks.order_by('id')
else:
s = get_stack( stacks, pos )
if s is None:
return []
else:
return [ s ]
def get_stack(stacks, pos):
""" Returns an image stack out of stacks. Which one is
determined by pos. This can either be an integer index
or the string "first" or "last".
"""
num_stacks = len(stacks)
# Just return if we got no stacks at all
if num_stacks == 0:
return None
# Check the type of the position informaiton
pos_type = type(pos)
if is_string_type(pos_type):
if pos == "first":
return stacks[0]
elif pos == "last":
return stacks[num_stacks - 1]
elif pos_type == int:
# Make sure we are in bounds
if pos >= 0 and pos < num_stacks:
return stacks[pos]
# Return None if nothing else matched
return None
def get_stack(stacks, pos):
""" Returns an image stack out of stacks. Which one is
determined by pos. This can either be an integer index
or the string "first" or "last".
"""
num_stacks = stacks.count()
# Just return if we got no stacks at all
if num_stacks == 0:
return None
# Check the type of the position informaiton
pos_type = type(pos)
if is_string_type( pos_type ):
if pos == "first":
return stacks.order_by('id')[0]
elif pos == "last":
return stacks.order_by('id')[num_stacks - 1]
elif pos_type == int:
# Make sure we are in bounds
if pos >= 0 and pos < num_stacks:
return stacks.order_by('id')[pos]
# Return None if nothing else matched
return None
