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# coding: utf-8
#
# Project: FabIO X-ray image reader
#
# Copyright (C) 2010-2016 European Synchrotron Radiation Facility
# Grenoble, France
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
"""
FabIO class for dealing with JPEG images.
"""
__authors__ = ["Valentin Valls"]
__date__ = "03/04/2020"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
__status__ = "stable"
import logging
logger = logging.getLogger(__name__)
try:
from PIL import Image
except ImportError:
Image = None
from .fabioimage import FabioImage
from .utils import pilutils
# List of reserved keys reached from
# http://pillow.readthedocs.io/en/3.4.x/handbook/image-file-formats.html#jpeg
JPEG_RESERVED_HEADER_KEYS = [
"jfif",
"jfif_version",
"jfif_density",
"jfif_unit",
"dpi",
"adobe",
"adobe_transform",
"progression",
"icc_profile",
"exif",
"quality",
"optimize",
"progressive",
"dpi",
"exif",
"subsampling",
"qtables"
]
class JpegImage(FabioImage):
"""
Images in JPEG format using PIL
"""
DESCRIPTION = "JPEG format"
DEFAULT_EXTENSIONS = ["jpg", "jpeg"]
RESERVED_HEADER_KEYS = JPEG_RESERVED_HEADER_KEYS
_need_a_seek_to_read = True
def __init__(self, *args, **kwds):
""" Tifimage constructor adds an nbits member attribute """
self.nbits = None
FabioImage.__init__(self, *args, **kwds)
def _readWithPil(self, filename, infile):
try:
infile.seek(0)
pilimage = Image.open(infile)
except Exception:
pilimage = None
infile.seek(0)
raise IOError("Error in opening %s with PIL" % filename)
data = pilutils.get_numpy_array(pilimage)
self.data = data
if pilimage and pilimage.info:
for k, v in pilimage.info.items():
self.header[k] = v
def read(self, filename, frame=None):
infile = self._open(filename, "rb")
self.data = None
if Image is not None:
self._readWithPil(filename, infile)
if self.data is None:
infile.seek(0)
raise IOError("Error in opening %s." % filename)
self.resetvals()
return self
jpegimage = JpegImage
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