def load_header(self, filestem):
try:
fp = open(filestem+".nii", 'rb')
except exceptions.IOError:
try:
fp = open(filestem+".hdr", 'rb')
except exceptions.IOError:
raise IOError("no NIFTI file found with this name: %s"%filestem)
self.filetype = 'dual'
else: self.filetype = 'single'
byte_order = byteorders[sys.byteorder]
self.swapped = False
reported_length = struct_unpack(fp, byte_order, field_formats[0:1])[0]
if reported_length != HEADER_SIZE:
byte_order = byteorders['swapped']
self.swapped = True
fp.seek(0)
# unpack all header values
values = struct_unpack(fp, byte_order, field_formats)
fp.close()
# now load values into self
hd_vals = dict()
map(hd_vals.__setitem__, struct_fields.keys(), values)
# sanity check? why not
if (self.filetype == 'single' and hd_vals['magic'] != 'n+1\x00') \
or (self.filetype == 'dual' and hd_vals['magic'] != 'ni1\x00'):
raise ValueError("Got file %s, but magic string is incorrect: %s"%\
(filestem, hd_vals['magic']))
#self.hdr = hd_vals
self.__dict__.update(hd_vals)
def dumpHeader(filename):
# Determine byte order of the header. The first header element is the
# header size. It should always be 384. If it is not then you know
# you read it in the wrong byte order.
byte_order = byteorders[sys.byteorder]
reported_length = struct_unpack(file(filename, "rb"), byte_order, field_formats[0:1])[0]
if reported_length != HEADER_SIZE:
byte_order = byteorders["swapped"]
# unpack all header values
values = struct_unpack(file(filename, "rb"), byte_order, field_formats)
for field, val in zip(struct_fields.keys(), values):
print field, " -- ", val
def dumpHeader(filename):
# Determine byte order of the header. The first header element is the
# header size. It should always be 384. If it is not then you know
# you read it in the wrong byte order.
byte_order = byteorders[sys.byteorder]
reported_length = struct_unpack(file(filename, 'rb'), byte_order,
field_formats[0:1])[0]
if reported_length != HEADER_SIZE:
byte_order = byteorders['swapped']
# unpack all header values
values = struct_unpack(file(filename, 'rb'), byte_order, field_formats)
for field, val in zip(struct_fields.keys(), values):
print field, " -- ", val
def load_header(self, filename):
"Load Analyze7.5 header from the given filename"
# Determine byte order of the header. The first header element is the
# header size. It should always be 384. If it is not then you know
# you read it in the wrong byte order.
byte_order = byteorders[sys.byteorder]
self.swapped = False
reported_length = struct_unpack(file(filename, "rb"), byte_order, field_formats[0:1])[0]
if reported_length != HEADER_SIZE:
byte_order = byteorders["swapped"]
self.swapped = True
# unpack all header values
values = struct_unpack(file(filename, "rb"), byte_order, field_formats)
# now load values into self
hd_vals = dict()
map(hd_vals.__setitem__, struct_fields.keys(), values)
self.__dict__.update(hd_vals)
def load_header(self, filename):
"Load Analyze7.5 header from the given filename"
# Determine byte order of the header. The first header element is the
# header size. It should always be 384. If it is not then you know
# you read it in the wrong byte order.
byte_order = byteorders[sys.byteorder]
self.swapped = False
reported_length = struct_unpack(file(filename, 'rb'), byte_order,
field_formats[0:1])[0]
if reported_length != HEADER_SIZE:
byte_order = byteorders['swapped']
self.swapped = True
# unpack all header values
values = struct_unpack(file(filename, 'rb'), byte_order, field_formats)
# now load values into self
hd_vals = dict()
map(hd_vals.__setitem__, struct_fields.keys(), values)
self.__dict__.update(hd_vals)
