/usr/lib/python2.7/dist-packages/fabio/openimage.py is in python-fabio 0.3.0+dfsg-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | # coding: utf-8
#
# Project: X-ray image reader
# https://github.com/kif/fabio
#
#
# Copyright (C) European Synchrotron Radiation Facility, Grenoble, France
#
# Principal author: Jérôme Kieffer (Jerome.Kieffer@ESRF.eu)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""
Authors: Henning O. Sorensen & Erik Knudsen
Center for Fundamental Research: Metal Structures in Four Dimensions
Risoe National Laboratory
Frederiksborgvej 399
DK-4000 Roskilde
email:henning.sorensen@risoe.dk
mods for fabio by JPW
modification for HDF5 by Jérôme Kieffer
"""
# Get ready for python3:
from __future__ import with_statement, print_function, absolute_import
import sys, logging
logger = logging.getLogger("openimage")
from .fabioutils import FilenameObject
from .fabioimage import FabioImage
from . import edfimage
from . import adscimage
from . import tifimage
from . import marccdimage
from . import mar345image
from . import fit2dmaskimage
from . import brukerimage
from . import bruker100image
from . import pnmimage
from . import GEimage
from . import OXDimage
from . import dm3image
from . import HiPiCimage
from . import pilatusimage
from . import fit2dspreadsheetimage
from . import kcdimage
from . import cbfimage
from . import xsdimage
from . import binaryimage
from . import pixiimage
from . import hdf5image
from . import raxisimage
from . import numpyimage
if sys.version_info[0] < 3:
bytes = str
from urlparse import urlparse
else:
from urllib.parse import urlparse
MAGIC_NUMBERS = [
# "\42\5a" : 'bzipped'
# "\1f\8b" : 'gzipped'
(b"FORMAT : 86" , 'bruker'),
(b"\x4d\x4d\x00\x2a" , 'tif') ,
# The marCCD and Pilatus formats are both standard tif with a header
# hopefully these byte patterns are unique for the formats
# If not the image will be read, but the is missing
(b"\x49\x49\x2a\x00\x08\x00" , 'marccd') ,
(b"\x49\x49\x2a\x00\x82\x00" , 'pilatus') ,
(b"\x49\x49\x2a\x00" , 'tif') ,
# ADSC must come before edf
(b"{\nHEA" , 'adsc'),
(b"{" , 'edf'),
(b"\r{" , 'edf'),
(b"\n{" , 'edf'),
(b"ADEPT" , 'GE'),
(b"OD" , 'OXD'),
(b"IM" , 'HiPiC'),
(b'\x2d\x04' , 'mar345'),
(b'\xd2\x04' , 'mar345'),
(b'\x04\x2d' , 'mar345'), # some machines may need byteswapping
(b'\x04\xd2' , 'mar345'),
# hint : MASK in 32 bit
(b'M\x00\x00\x00A\x00\x00\x00S\x00\x00\x00K\x00\x00\x00' , 'fit2dmask') ,
(b'\x00\x00\x00\x03' , 'dm3'),
(b"No" , "kcd"),
(b"<" , "xsd"),
(b"\n\xb8\x03\x00" , 'pixi'),
(b"\x89\x48\x44\x46" , 'hdf5'),
(b"R-AXIS" , 'raxis'),
(b"\x93NUMPY" , 'numpy')
]
URL_PREFIX = {"file:":False, "hdf5:":True, "h5:":True, "nxs:": True}
def do_magic(byts):
""" Try to interpret the bytes starting the file as a magic number """
for magic, format_type in MAGIC_NUMBERS:
if byts.find(magic) == 0:
return format_type
if 0: # debugging - bruker needed 18 bytes below
logger.debug("m: %s f: %s", magic, format_type)
logger.debug("bytes: %s len(bytes) %s", magic, len(magic))
logger.debug("found: %s", byts.find(magic))
for i in range(len(magic)):
logger.debug("%s %s %s %s ", ord(magic[i]), ord(byts[i]), magic[i], byts[i])
raise Exception("Could not interpret magic string")
def openimage(filename, frame=None):
""" Try to open an image """
if isinstance(filename, FilenameObject):
try:
logger.debug("Attempting to open %s" % (filename.tostring()))
obj = _openimage(filename.tostring())
logger.debug("Attempting to read frame %s from %s" % (frame,
filename.tostring()))
obj = obj.read(filename.tostring(), frame)
except Exception as ex:
# multiframe file
# logger.debug( "DEBUG: multiframe file, start # %d"%(
# filename.num)
logger.debug("Exception %s, trying name %s" % (ex, filename.stem))
obj = _openimage(filename.stem)
logger.debug("Reading frame %s from %s" % (filename.num, filename.stem))
obj.read(filename.stem, frame=filename.num)
else:
logger.debug("Attempting to open %s" % (filename))
obj = _openimage(filename)
logger.debug("Attempting to read frame %s from %s" % (frame, filename))
obj = obj.read(obj.filename, frame)
return obj
def openheader(filename):
""" return only the header"""
obj = _openimage(filename)
obj.readheader(obj.filename)
return obj
def _openimage(filename):
"""
determine which format for a filename
and return appropriate class which can be used for opening the image
@param filename: can be an url like:
hdf5:///example.h5?entry/instrument/detector/data/data#slice=[:,:,5]
"""
url = urlparse(filename)
# related to https://github.com/kif/fabio/issues/34
if len(url.scheme) == 1 and (sys.platform == "win32"):
# this is likely a C: from windows
filename = url.scheme + ":" + url.path
else:
filename = url.path
try:
imo = FabioImage()
byts = imo._open(filename).read(18)
filetype = do_magic(byts)
if filetype == "marccd" and filename.find("mccd") == -1:
# Cannot see a way around this. Need to find something
# to distinguish mccd from regular tif...
filetype = "tif"
except IOError as error:
logger.error("%s: File probably does not exist", error)
raise error
except:
try:
file_obj = FilenameObject(filename=filename)
if file_obj == None:
raise Exception("Unable to deconstruct filename")
if (file_obj.format is not None) and\
len(file_obj.format) != 1 and \
type(file_obj.format) != type(["list"]):
# one of OXD/ ADSC - should have got in previous
raise Exception("openimage failed on magic bytes & name guess")
filetype = file_obj.format
# UNUSED filenumber = file_obj.num
except Exception as error:
logger.error(error)
import traceback
traceback.print_exc()
raise Exception("Fabio could not identify " + filename)
klass_name = "".join(filetype) + 'image'
try:
obj = FabioImage.factory(klass_name)
except RuntimeError as err:
logger.error("Filetype not known %s %s" % (filename, klass_name))
raise err
if url.scheme in ["nxs", "hdf5"] and filetype == "hdf5":
obj.set_url(url)
obj.filename = filename
# skip the read for read header
return obj
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