def test_exif_gps_data():
'''
Test extractiion of GPS data
'''
result = extract_exif(GPS_JPG)
gps = get_gps_data(result)
assert gps == {
'latitude': 59.336666666666666,
'direction': 25.674046740467404,
'altitude': 37.64365671641791,
'longitude': 18.016166666666667}
def test_exif_no_exif():
"""
Test an image without exif
"""
result = extract_exif(EMPTY_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
assert result == {}
assert clean == {}
assert gps == {}
assert useful == {}
def test_exif_bad_image():
"""
Test EXIF extraction from a faithful, but bad image
"""
result = extract_exif(BAD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
assert result == {}
assert clean == {}
assert gps == {}
assert useful == {}
def test_exif_gps_data():
"""
Test extractiion of GPS data
"""
result = extract_exif(GPS_JPG)
gps = get_gps_data(result)
assert gps == {
"latitude": 59.336666666666666,
"direction": 25.674046740467404,
"altitude": 37.64365671641791,
"longitude": 18.016166666666667,
}
def test_exif_image_orientation():
"""
Test image reorientation based on EXIF data
"""
result = extract_exif(GOOD_JPG)
image = exif_fix_image_orientation(Image.open(GOOD_JPG), result)
# Are the dimensions correct?
assert image.size == (428, 640)
# If this pixel looks right, the rest of the image probably will too.
assert_in(image.getdata()[10000], ((41, 28, 11), (43, 27, 11)))
def process_image(proc_state):
"""Code to process an image. Will be run by celery.
A Workbench() represents a local tempory dir. It is automatically
cleaned up when this function exits.
"""
entry = proc_state.entry
workbench = proc_state.workbench
# Conversions subdirectory to avoid collisions
conversions_subdir = os.path.join(
workbench.dir, 'conversions')
os.mkdir(conversions_subdir)
queued_filename = proc_state.get_queued_filename()
name_builder = FilenameBuilder(queued_filename)
# EXIF extraction
exif_tags = extract_exif(queued_filename)
gps_data = get_gps_data(exif_tags)
# Always create a small thumbnail
resize_tool(proc_state, True, 'thumb',
name_builder.fill('{basename}.thumbnail{ext}'),
conversions_subdir, exif_tags)
# Possibly create a medium
resize_tool(proc_state, False, 'medium',
name_builder.fill('{basename}.medium{ext}'),
conversions_subdir, exif_tags)
# Copy our queued local workbench to its final destination
proc_state.copy_original(name_builder.fill('{basename}{ext}'))
# Remove queued media file from storage and database
proc_state.delete_queue_file()
# Insert exif data into database
exif_all = clean_exif(exif_tags)
if len(exif_all):
entry.media_data_init(exif_all=exif_all)
if len(gps_data):
for key in list(gps_data.keys()):
gps_data['gps_' + key] = gps_data.pop(key)
entry.media_data_init(**gps_data)
def test_exif_image_orientation():
'''
Test image reorientation based on EXIF data
'''
result = extract_exif(GOOD_JPG)
image = exif_fix_image_orientation(
Image.open(GOOD_JPG),
result)
# Are the dimensions correct?
assert image.size in ((428, 640), (640, 428))
# If this pixel looks right, the rest of the image probably will too.
# It seems different values are being seen on different platforms/systems
# as of ccca39f1 it seems we're adding to the list those which are seen.
assert_in(image.getdata()[10000],
((37, 23, 14), (41, 28, 11), (43, 27, 11))
)
def common_setup(self):
"""
Set up the workbench directory and pull down the original file
"""
self.image_config = mgg.global_config[
'media_type:mediagoblin.media_types.image']
## @@: Should this be two functions?
# Conversions subdirectory to avoid collisions
self.conversions_subdir = os.path.join(
self.workbench.dir, 'convirsions')
os.mkdir(self.conversions_subdir)
# Pull down and set up the processing file
self.process_filename = get_process_filename(
self.entry, self.workbench, self.acceptable_files)
self.name_builder = FilenameBuilder(self.process_filename)
# Exif extraction
self.exif_tags = extract_exif(self.process_filename)
def test_exif_extraction():
'''
Test EXIF extraction from a good image
'''
result = extract_exif(GOOD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
# Do we have the result?
assert len(result) == 56
# Do we have clean data?
assert len(clean) == 53
# GPS data?
assert gps == {}
# Do we have the "useful" tags?
assert useful == {
'EXIF Flash': {
'field_type': 3,
'printable': u'Flash did not fire',
'field_offset': 380,
'tag': 37385,
'values': [0],
'field_length': 2},
'EXIF ExposureTime': {
'field_type': 5,
'printable': '1/125',
'field_offset': 700,
'tag': 33434,
'values': [[1, 125]],
'field_length': 8},
'EXIF FocalLength': {
'field_type': 5,
'printable': '18',
'field_offset': 780,
'tag': 37386,
'values': [[18, 1]],
'field_length': 8},
'Image Model': {
'field_type': 2,
'printable': 'NIKON D80',
'field_offset': 152,
'tag': 272,
'values': 'NIKON D80',
'field_length': 10},
'Image Make': {
'field_type': 2,
'printable': 'NIKON CORPORATION',
'field_offset': 134,
'tag': 271,
'values': 'NIKON CORPORATION',
'field_length': 18},
'EXIF ExposureMode': {
'field_type': 3,
'printable': 'Manual Exposure',
'field_offset': 584,
'tag': 41986,
'values': [1],
'field_length': 2},
'EXIF ISOSpeedRatings': {
'field_type': 3,
'printable': '100',
'field_offset': 260,
'tag': 34855,
'values': [100],
'field_length': 2},
'EXIF FNumber': {
'field_type': 5,
'printable': '10',
'field_offset': 708,
'tag': 33437,
'values': [[10, 1]],
'field_length': 8}}
proc_state.copy_original(name_builder.fill('{basename}{ext}'))
# Remove queued media file from storage and database
proc_state.delete_queue_file()
# Insert exif data into database
exif_all = clean_exif(exif_tags)
if len(exif_all):
entry.media_data_init(exif_all=exif_all)
if len(gps_data):
for key in list(gps_data.keys()):
gps_data['gps_' + key] = gps_data.pop(key)
entry.media_data_init(**gps_data)
if __name__ == '__main__':
import sys
import pprint
pp = pprint.PrettyPrinter()
result = extract_exif(sys.argv[1])
gps = get_gps_data(result)
clean = clean_exif(result)
useful = get_useful(clean)
print pp.pprint(
clean)
def test_exif_extraction():
"""
Test EXIF extraction from a good image
"""
result = extract_exif(GOOD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
# Do we have the result?
assert len(result) == 56
# Do we have clean data?
assert len(clean) == 53
# GPS data?
assert gps == {}
# Do we have the "useful" tags?
assert useful == {
"EXIF Flash": {
"field_type": 3,
"printable": u"Flash did not fire",
"field_offset": 380,
"tag": 37385,
"values": [0],
"field_length": 2,
},
"EXIF ExposureTime": {
"field_type": 5,
"printable": "1/125",
"field_offset": 700,
"tag": 33434,
"values": [[1, 125]],
"field_length": 8,
},
"EXIF FocalLength": {
"field_type": 5,
"printable": "18",
"field_offset": 780,
"tag": 37386,
"values": [[18, 1]],
"field_length": 8,
},
"Image Model": {
"field_type": 2,
"printable": "NIKON D80",
"field_offset": 152,
"tag": 272,
"values": "NIKON D80",
"field_length": 10,
},
"Image Make": {
"field_type": 2,
"printable": "NIKON CORPORATION",
"field_offset": 134,
"tag": 271,
"values": "NIKON CORPORATION",
"field_length": 18,
},
"EXIF ExposureMode": {
"field_type": 3,
"printable": "Manual Exposure",
"field_offset": 584,
"tag": 41986,
"values": [1],
"field_length": 2,
},
"EXIF ISOSpeedRatings": {
"field_type": 3,
"printable": "100",
"field_offset": 260,
"tag": 34855,
"values": [100],
"field_length": 2,
},
"EXIF FNumber": {
"field_type": 5,
"printable": "10",
"field_offset": 708,
"tag": 33437,
"values": [[10, 1]],
"field_length": 8,
},
}
def test_exif_extraction():
'''
Test EXIF extraction from a good image
'''
result = extract_exif(GOOD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
# Do we have the result?
assert len(result) >= 50
# Do we have clean data?
assert len(clean) >= 50
# GPS data?
assert gps == {}
# Do we have the "useful" tags?
expected = OrderedDict({
'EXIF CVAPattern': {
'field_length': 8,
'field_offset': 26224,
'field_type': 7,
'printable': '[0, 2, 0, 2, 1, 2, 0, 1]',
'tag': 41730,
'values': [0, 2, 0, 2, 1, 2, 0, 1]
},
'EXIF ColorSpace': {
'field_length': 2,
'field_offset': 476,
'field_type': 3,
'printable': 'sRGB',
'tag': 40961,
'values': [1]
},
'EXIF ComponentsConfiguration': {
'field_length': 4,
'field_offset': 308,
'field_type': 7,
'printable': 'YCbCr',
'tag': 37121,
'values': [1, 2, 3, 0]
},
'EXIF CompressedBitsPerPixel': {
'field_length': 8,
'field_offset': 756,
'field_type': 5,
'printable': '4',
'tag': 37122,
'values': [[4, 1]]
},
'EXIF Contrast': {
'field_length': 2,
'field_offset': 656,
'field_type': 3,
'printable': 'Soft',
'tag': 41992,
'values': [1]
},
'EXIF CustomRendered': {
'field_length': 2,
'field_offset': 572,
'field_type': 3,
'printable': 'Normal',
'tag': 41985,
'values': [0]
},
'EXIF DateTimeDigitized': {
'field_length': 20,
'field_offset': 736,
'field_type': 2,
'printable': '2011:06:22 12:20:33',
'tag': 36868,
'values': '2011:06:22 12:20:33'
},
'EXIF DateTimeOriginal': {
'field_length': 20,
'field_offset': 716,
'field_type': 2,
'printable': '2011:06:22 12:20:33',
'tag': 36867,
'values': '2011:06:22 12:20:33'
},
'EXIF DigitalZoomRatio': {
'field_length': 8,
'field_offset': 26232,
'field_type': 5,
'printable': '1',
'tag': 41988,
'values': [[1, 1]]
},
'EXIF ExifImageLength': {
'field_length': 2,
'field_offset': 500,
'field_type': 3,
'printable': '2592',
'tag': 40963,
'values': [2592]
},
'EXIF ExifImageWidth': {
'field_length': 2,
'field_offset': 488,
'field_type': 3,
'printable': '3872',
'tag': 40962,
'values': [3872]
},
'EXIF ExifVersion': {
'field_length': 4,
'field_offset': 272,
'field_type': 7,
'printable': '0221',
'tag': 36864,
'values': [48, 50, 50, 49]
},
'EXIF ExposureBiasValue': {
'field_length': 8,
'field_offset': 764,
'field_type': 10,
'printable': '0',
'tag': 37380,
'values': [[0, 1]]
},
'EXIF ExposureMode': {
'field_length': 2,
'field_offset': 584,
'field_type': 3,
'printable': 'Manual Exposure',
'tag': 41986,
'values': [1]
},
'EXIF ExposureProgram': {
'field_length': 2,
'field_offset': 248,
'field_type': 3,
'printable': 'Manual',
'tag': 34850,
'values': [1]
},
'EXIF ExposureTime': {
'field_length': 8,
'field_offset': 700,
'field_type': 5,
'printable': '1/125',
'tag': 33434,
'values': [[1, 125]]
},
'EXIF FNumber': {
'field_length': 8,
'field_offset': 708,
'field_type': 5,
'printable': '10',
'tag': 33437,
'values': [[10, 1]]
},
'EXIF FileSource': {
'field_length': 1,
'field_offset': 536,
'field_type': 7,
'printable': 'Digital Camera',
'tag': 41728,
'values': [3]
},
'EXIF Flash': {
'field_length': 2,
'field_offset': 380,
'field_type': 3,
'printable': 'Flash did not fire',
'tag': 37385,
'values': [0]
},
'EXIF FlashPixVersion': {
'field_length': 4,
'field_offset': 464,
'field_type': 7,
'printable': '0100',
'tag': 40960,
'values': [48, 49, 48, 48]
},
'EXIF FocalLength': {
'field_length': 8,
'field_offset': 780,
'field_type': 5,
'printable': '18',
'tag': 37386,
'values': [[18, 1]]
},
'EXIF FocalLengthIn35mmFilm': {
'field_length': 2,
'field_offset': 620,
'field_type': 3,
'printable': '27',
'tag': 41989,
'values': [27]
},
'EXIF GainControl': {
'field_length': 2,
'field_offset': 644,
'field_type': 3,
'printable': 'None',
'tag': 41991,
'values': [0]
},
'EXIF ISOSpeedRatings': {
'field_length': 2,
'field_offset': 260,
'field_type': 3,
'printable': '100',
'tag': 34855,
'values': [100]
},
'EXIF InteroperabilityOffset': {
'field_length': 4,
'field_offset': 512,
'field_type': 4,
'printable': '26240',
'tag': 40965,
'values': [26240]
},
'EXIF LightSource': {
'field_length': 2,
'field_offset': 368,
'field_type': 3,
'printable': 'Unknown',
'tag': 37384,
'values': [0]
},
'EXIF MaxApertureValue': {
'field_length': 8,
'field_offset': 772,
'field_type': 5,
'printable': '18/5',
'tag': 37381,
'values': [[18, 5]]
},
'EXIF MeteringMode': {
'field_length': 2,
'field_offset': 356,
'field_type': 3,
'printable': 'Pattern',
'tag': 37383,
'values': [5]
},
'EXIF Saturation': {
'field_length': 2,
'field_offset': 668,
'field_type': 3,
'printable': 'Normal',
'tag': 41993,
'values': [0]
},
'EXIF SceneCaptureType': {
'field_length': 2,
'field_offset': 632,
'field_type': 3,
'printable': 'Standard',
'tag': 41990,
'values': [0]
},
'EXIF SceneType': {
'field_length': 1,
'field_offset': 548,
'field_type': 7,
'printable': 'Directly Photographed',
'tag': 41729,
'values': [1]
},
'EXIF SensingMethod': {
'field_length': 2,
'field_offset': 524,
'field_type': 3,
'printable': 'One-chip color area',
'tag': 41495,
'values': [2]
},
'EXIF Sharpness': {
'field_length': 2,
'field_offset': 680,
'field_type': 3,
'printable': 'Normal',
'tag': 41994,
'values': [0]
},
'EXIF SubSecTime': {
'field_length': 3,
'field_offset': 428,
'field_type': 2,
'printable': '10',
'tag': 37520,
'values': '10'
},
'EXIF SubSecTimeDigitized': {
'field_length': 3,
'field_offset': 452,
'field_type': 2,
'printable': '10',
'tag': 37522,
'values': '10'
},
'EXIF SubSecTimeOriginal': {
'field_length': 3,
'field_offset': 440,
'field_type': 2,
'printable': '10',
'tag': 37521,
'values': '10'
},
'EXIF SubjectDistanceRange': {
'field_length': 2,
'field_offset': 692,
'field_type': 3,
'printable': '0',
'tag': 41996,
'values': [0]
},
'EXIF WhiteBalance': {
'field_length': 2,
'field_offset': 596,
'field_type': 3,
'printable': 'Auto',
'tag': 41987,
'values': [0]
},
'Image DateTime': {
'field_length': 20,
'field_offset': 194,
'field_type': 2,
'printable': '2011:06:22 12:20:33',
'tag': 306,
'values': '2011:06:22 12:20:33'
},
'Image ExifOffset': {
'field_length': 4,
'field_offset': 126,
'field_type': 4,
'printable': '214',
'tag': 34665,
'values': [214]
},
'Image Make': {
'field_length': 18,
'field_offset': 134,
'field_type': 2,
'printable': 'NIKON CORPORATION',
'tag': 271,
'values': 'NIKON CORPORATION'
},
'Image Model': {
'field_length': 10,
'field_offset': 152,
'field_type': 2,
'printable': 'NIKON D80',
'tag': 272,
'values': 'NIKON D80'
},
'Image Orientation': {
'field_length': 2,
'field_offset': 42,
'field_type': 3,
'printable': 'Rotated 90 CW',
'tag': 274,
'values': [6]
},
'Image ResolutionUnit': {
'field_length': 2,
'field_offset': 78,
'field_type': 3,
'printable': 'Pixels/Inch',
'tag': 296,
'values': [2]
},
'Image Software': {
'field_length': 15,
'field_offset': 178,
'field_type': 2,
'printable': 'Shotwell 0.9.3',
'tag': 305,
'values': 'Shotwell 0.9.3'
},
'Image XResolution': {
'field_length': 8,
'field_offset': 162,
'field_type': 5,
'printable': '300',
'tag': 282,
'values': [[300, 1]]
},
'Image YCbCrPositioning': {
'field_length': 2,
'field_offset': 114,
'field_type': 3,
'printable': 'Co-sited',
'tag': 531,
'values': [2]
},
'Image YResolution': {
'field_length': 8,
'field_offset': 170,
'field_type': 5,
'printable': '300',
'tag': 283,
'values': [[300, 1]]
},
'Thumbnail Compression': {
'field_length': 2,
'field_offset': 26280,
'field_type': 3,
'printable': 'JPEG (old-style)',
'tag': 259,
'values': [6]
},
'Thumbnail ResolutionUnit': {
'field_length': 2,
'field_offset': 26316,
'field_type': 3,
'printable': 'Pixels/Inch',
'tag': 296,
'values': [2]
},
'Thumbnail XResolution': {
'field_length': 8,
'field_offset': 26360,
'field_type': 5,
'printable': '300',
'tag': 282,
'values': [[300, 1]]
},
'Thumbnail YCbCrPositioning': {
'field_length': 2,
'field_offset': 26352,
'field_type': 3,
'printable': 'Co-sited',
'tag': 531,
'values': [2]
},
'Thumbnail YResolution': {
'field_length': 8,
'field_offset': 26368,
'field_type': 5,
'printable': '300',
'tag': 283,
'values': [[300, 1]]
}
})
for key in expected.keys():
assert useful[key] == expected[key]
def process_image(entry):
"""
Code to process an image
"""
workbench = mgg.workbench_manager.create_workbench()
# Conversions subdirectory to avoid collisions
conversions_subdir = os.path.join(
workbench.dir, 'conversions')
os.mkdir(conversions_subdir)
queued_filepath = entry.queued_media_file
queued_filename = workbench.localized_file(
mgg.queue_store, queued_filepath,
'source')
name_builder = FilenameBuilder(queued_filename)
# EXIF extraction
exif_tags = extract_exif(queued_filename)
gps_data = get_gps_data(exif_tags)
# Always create a small thumbnail
thumb_filepath = create_pub_filepath(
entry, name_builder.fill('{basename}.thumbnail{ext}'))
resize_image(entry, queued_filename, thumb_filepath,
exif_tags, conversions_subdir,
(mgg.global_config['media:thumb']['max_width'],
mgg.global_config['media:thumb']['max_height']))
# If the size of the original file exceeds the specified size of a `medium`
# file, a `.medium.jpg` files is created and later associated with the media
# entry.
medium = Image.open(queued_filename)
if medium.size[0] > mgg.global_config['media:medium']['max_width'] \
or medium.size[1] > mgg.global_config['media:medium']['max_height'] \
or exif_image_needs_rotation(exif_tags):
medium_filepath = create_pub_filepath(
entry, name_builder.fill('{basename}.medium{ext}'))
resize_image(
entry, queued_filename, medium_filepath,
exif_tags, conversions_subdir,
(mgg.global_config['media:medium']['max_width'],
mgg.global_config['media:medium']['max_height']))
else:
medium_filepath = None
# we have to re-read because unlike PIL, not everything reads
# things in string representation :)
queued_file = file(queued_filename, 'rb')
with queued_file:
original_filepath = create_pub_filepath(
entry, name_builder.fill('{basename}{ext}'))
with mgg.public_store.get_file(original_filepath, 'wb') \
as original_file:
original_file.write(queued_file.read())
# Remove queued media file from storage and database
mgg.queue_store.delete_file(queued_filepath)
entry.queued_media_file = []
# Insert media file information into database
media_files_dict = entry.setdefault('media_files', {})
media_files_dict[u'thumb'] = thumb_filepath
media_files_dict[u'original'] = original_filepath
if medium_filepath:
media_files_dict[u'medium'] = medium_filepath
# Insert exif data into database
exif_all = clean_exif(exif_tags)
if len(exif_all):
entry.media_data_init(exif_all=exif_all)
if len(gps_data):
for key in list(gps_data.keys()):
gps_data['gps_' + key] = gps_data.pop(key)
entry.media_data_init(**gps_data)
# clean up workbench
workbench.destroy_self()
# Copy our queued local workbench to its final destination
proc_state.copy_original(name_builder.fill('{basename}{ext}'))
# Remove queued media file from storage and database
proc_state.delete_queue_file()
# Insert exif data into database
exif_all = clean_exif(exif_tags)
if len(exif_all):
entry.media_data_init(exif_all=exif_all)
if len(gps_data):
for key in list(gps_data.keys()):
gps_data['gps_' + key] = gps_data.pop(key)
entry.media_data_init(**gps_data)
if __name__ == '__main__':
import sys
import pprint
pp = pprint.PrettyPrinter()
result = extract_exif(sys.argv[1])
gps = get_gps_data(result)
clean = clean_exif(result)
useful = get_useful(clean)
print pp.pprint(clean)
def test_exif_extraction():
"""
Test EXIF extraction from a good image
"""
result = extract_exif(GOOD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
# Do we have the result?
assert len(result) == 55
# Do we have clean data?
assert len(clean) == 53
# GPS data?
assert gps == {}
# Do we have the "useful" tags?
expected = OrderedDict(
{
"EXIF CVAPattern": {
"field_length": 8,
"field_offset": 26224,
"field_type": 7,
"printable": "[0, 2, 0, 2, 1, 2, 0, 1]",
"tag": 41730,
"values": [0, 2, 0, 2, 1, 2, 0, 1],
},
"EXIF ColorSpace": {
"field_length": 2,
"field_offset": 476,
"field_type": 3,
"printable": "sRGB",
"tag": 40961,
"values": [1],
},
"EXIF ComponentsConfiguration": {
"field_length": 4,
"field_offset": 308,
"field_type": 7,
"printable": "YCbCr",
"tag": 37121,
"values": [1, 2, 3, 0],
},
"EXIF CompressedBitsPerPixel": {
"field_length": 8,
"field_offset": 756,
"field_type": 5,
"printable": u"4",
"tag": 37122,
"values": [[4, 1]],
},
"EXIF Contrast": {
"field_length": 2,
"field_offset": 656,
"field_type": 3,
"printable": u"Soft",
"tag": 41992,
"values": [1],
},
"EXIF CustomRendered": {
"field_length": 2,
"field_offset": 572,
"field_type": 3,
"printable": u"Normal",
"tag": 41985,
"values": [0],
},
"EXIF DateTimeDigitized": {
"field_length": 20,
"field_offset": 736,
"field_type": 2,
"printable": u"2011:06:22 12:20:33",
"tag": 36868,
"values": u"2011:06:22 12:20:33",
},
"EXIF DateTimeOriginal": {
"field_length": 20,
"field_offset": 716,
"field_type": 2,
"printable": u"2011:06:22 12:20:33",
"tag": 36867,
"values": u"2011:06:22 12:20:33",
},
"EXIF DigitalZoomRatio": {
"field_length": 8,
"field_offset": 26232,
"field_type": 5,
"printable": u"1",
"tag": 41988,
"values": [[1, 1]],
},
"EXIF ExifImageLength": {
"field_length": 2,
"field_offset": 500,
"field_type": 3,
"printable": u"2592",
"tag": 40963,
"values": [2592],
},
"EXIF ExifImageWidth": {
"field_length": 2,
"field_offset": 488,
"field_type": 3,
"printable": u"3872",
"tag": 40962,
"values": [3872],
},
"EXIF ExifVersion": {
"field_length": 4,
"field_offset": 272,
"field_type": 7,
"printable": u"0221",
"tag": 36864,
"values": [48, 50, 50, 49],
},
"EXIF ExposureBiasValue": {
"field_length": 8,
"field_offset": 764,
"field_type": 10,
"printable": u"0",
"tag": 37380,
"values": [[0, 1]],
},
"EXIF ExposureMode": {
"field_length": 2,
"field_offset": 584,
"field_type": 3,
"printable": u"Manual Exposure",
"tag": 41986,
"values": [1],
},
"EXIF ExposureProgram": {
"field_length": 2,
"field_offset": 248,
"field_type": 3,
"printable": u"Manual",
"tag": 34850,
"values": [1],
},
"EXIF ExposureTime": {
"field_length": 8,
"field_offset": 700,
"field_type": 5,
"printable": u"1/125",
"tag": 33434,
"values": [[1, 125]],
},
"EXIF FNumber": {
"field_length": 8,
"field_offset": 708,
"field_type": 5,
"printable": u"10",
"tag": 33437,
"values": [[10, 1]],
},
"EXIF FileSource": {
"field_length": 1,
"field_offset": 536,
"field_type": 7,
"printable": u"Digital Camera",
"tag": 41728,
"values": [3],
},
"EXIF Flash": {
"field_length": 2,
"field_offset": 380,
"field_type": 3,
"printable": u"Flash did not fire",
"tag": 37385,
"values": [0],
},
"EXIF FlashPixVersion": {
"field_length": 4,
"field_offset": 464,
"field_type": 7,
"printable": u"0100",
"tag": 40960,
"values": [48, 49, 48, 48],
},
"EXIF FocalLength": {
"field_length": 8,
"field_offset": 780,
"field_type": 5,
"printable": u"18",
"tag": 37386,
"values": [[18, 1]],
},
"EXIF FocalLengthIn35mmFilm": {
"field_length": 2,
"field_offset": 620,
"field_type": 3,
"printable": u"27",
"tag": 41989,
"values": [27],
},
"EXIF GainControl": {
"field_length": 2,
"field_offset": 644,
"field_type": 3,
"printable": u"None",
"tag": 41991,
"values": [0],
},
"EXIF ISOSpeedRatings": {
"field_length": 2,
"field_offset": 260,
"field_type": 3,
"printable": u"100",
"tag": 34855,
"values": [100],
},
"EXIF InteroperabilityOffset": {
"field_length": 4,
"field_offset": 512,
"field_type": 4,
"printable": u"26240",
"tag": 40965,
"values": [26240],
},
"EXIF LightSource": {
"field_length": 2,
"field_offset": 368,
"field_type": 3,
"printable": u"Unknown",
"tag": 37384,
"values": [0],
},
"EXIF MaxApertureValue": {
"field_length": 8,
"field_offset": 772,
"field_type": 5,
"printable": u"18/5",
"tag": 37381,
"values": [[18, 5]],
},
"EXIF MeteringMode": {
"field_length": 2,
"field_offset": 356,
"field_type": 3,
"printable": u"Pattern",
"tag": 37383,
"values": [5],
},
"EXIF Saturation": {
"field_length": 2,
"field_offset": 668,
"field_type": 3,
"printable": u"Normal",
"tag": 41993,
"values": [0],
},
"EXIF SceneCaptureType": {
"field_length": 2,
"field_offset": 632,
"field_type": 3,
"printable": u"Standard",
"tag": 41990,
"values": [0],
},
"EXIF SceneType": {
"field_length": 1,
"field_offset": 548,
"field_type": 7,
"printable": u"Directly Photographed",
"tag": 41729,
"values": [1],
},
"EXIF SensingMethod": {
"field_length": 2,
"field_offset": 524,
"field_type": 3,
"printable": u"One-chip color area",
"tag": 41495,
"values": [2],
},
"EXIF Sharpness": {
"field_length": 2,
"field_offset": 680,
"field_type": 3,
"printable": u"Normal",
"tag": 41994,
"values": [0],
},
"EXIF SubSecTime": {
"field_length": 3,
"field_offset": 428,
"field_type": 2,
"printable": u"10",
"tag": 37520,
"values": u"10",
},
"EXIF SubSecTimeDigitized": {
"field_length": 3,
"field_offset": 452,
"field_type": 2,
"printable": u"10",
"tag": 37522,
"values": u"10",
},
"EXIF SubSecTimeOriginal": {
"field_length": 3,
"field_offset": 440,
"field_type": 2,
"printable": u"10",
"tag": 37521,
"values": u"10",
},
"EXIF SubjectDistanceRange": {
"field_length": 2,
"field_offset": 692,
"field_type": 3,
"printable": u"0",
"tag": 41996,
"values": [0],
},
"EXIF WhiteBalance": {
"field_length": 2,
"field_offset": 596,
"field_type": 3,
"printable": u"Auto",
"tag": 41987,
"values": [0],
},
"Image DateTime": {
"field_length": 20,
"field_offset": 194,
"field_type": 2,
"printable": u"2011:06:22 12:20:33",
"tag": 306,
"values": u"2011:06:22 12:20:33",
},
"Image ExifOffset": {
"field_length": 4,
"field_offset": 126,
"field_type": 4,
"printable": u"214",
"tag": 34665,
"values": [214],
},
"Image Make": {
"field_length": 18,
"field_offset": 134,
"field_type": 2,
"printable": u"NIKON CORPORATION",
"tag": 271,
"values": u"NIKON CORPORATION",
},
"Image Model": {
"field_length": 10,
"field_offset": 152,
"field_type": 2,
"printable": u"NIKON D80",
"tag": 272,
"values": u"NIKON D80",
},
"Image Orientation": {
"field_length": 2,
"field_offset": 42,
"field_type": 3,
"printable": u"Rotated 90 CCW",
"tag": 274,
"values": [6],
},
"Image ResolutionUnit": {
"field_length": 2,
"field_offset": 78,
"field_type": 3,
"printable": u"Pixels/Inch",
"tag": 296,
"values": [2],
},
"Image Software": {
"field_length": 15,
"field_offset": 178,
"field_type": 2,
"printable": u"Shotwell 0.9.3",
"tag": 305,
"values": u"Shotwell 0.9.3",
},
"Image XResolution": {
"field_length": 8,
"field_offset": 162,
"field_type": 5,
"printable": u"300",
"tag": 282,
"values": [[300, 1]],
},
"Image YCbCrPositioning": {
"field_length": 2,
"field_offset": 114,
"field_type": 3,
"printable": u"Co-sited",
"tag": 531,
"values": [2],
},
"Image YResolution": {
"field_length": 8,
"field_offset": 170,
"field_type": 5,
"printable": u"300",
"tag": 283,
"values": [[300, 1]],
},
"Thumbnail Compression": {
"field_length": 2,
"field_offset": 26280,
"field_type": 3,
"printable": u"JPEG (old-style)",
"tag": 259,
"values": [6],
},
"Thumbnail ResolutionUnit": {
"field_length": 2,
"field_offset": 26316,
"field_type": 3,
"printable": u"Pixels/Inch",
"tag": 296,
"values": [2],
},
"Thumbnail XResolution": {
"field_length": 8,
"field_offset": 26360,
"field_type": 5,
"printable": u"300",
"tag": 282,
"values": [[300, 1]],
},
"Thumbnail YCbCrPositioning": {
"field_length": 2,
"field_offset": 26352,
"field_type": 3,
"printable": u"Co-sited",
"tag": 531,
"values": [2],
},
"Thumbnail YResolution": {
"field_length": 8,
"field_offset": 26368,
"field_type": 5,
"printable": u"300",
"tag": 283,
"values": [[300, 1]],
},
}
)
for k, v in useful.items():
assert v == expected[k]
def test_exif_extraction():
'''
Test EXIF extraction from a good image
'''
result = extract_exif(GOOD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
# Do we have the result?
assert len(result) >= 50
# Do we have clean data?
assert len(clean) >= 50
# GPS data?
assert gps == {}
# Do we have the "useful" tags?
expected = OrderedDict({'EXIF CVAPattern': {'field_length': 8,
'field_offset': 26224,
'field_type': 7,
'printable': '[0, 2, 0, 2, 1, 2, 0, 1]',
'tag': 41730,
'values': [0, 2, 0, 2, 1, 2, 0, 1]},
'EXIF ColorSpace': {'field_length': 2,
'field_offset': 476,
'field_type': 3,
'printable': 'sRGB',
'tag': 40961,
'values': [1]},
'EXIF ComponentsConfiguration': {'field_length': 4,
'field_offset': 308,
'field_type': 7,
'printable': 'YCbCr',
'tag': 37121,
'values': [1, 2, 3, 0]},
'EXIF CompressedBitsPerPixel': {'field_length': 8,
'field_offset': 756,
'field_type': 5,
'printable': u'4',
'tag': 37122,
'values': [[4, 1]]},
'EXIF Contrast': {'field_length': 2,
'field_offset': 656,
'field_type': 3,
'printable': u'Soft',
'tag': 41992,
'values': [1]},
'EXIF CustomRendered': {'field_length': 2,
'field_offset': 572,
'field_type': 3,
'printable': u'Normal',
'tag': 41985,
'values': [0]},
'EXIF DateTimeDigitized': {'field_length': 20,
'field_offset': 736,
'field_type': 2,
'printable': u'2011:06:22 12:20:33',
'tag': 36868,
'values': u'2011:06:22 12:20:33'},
'EXIF DateTimeOriginal': {'field_length': 20,
'field_offset': 716,
'field_type': 2,
'printable': u'2011:06:22 12:20:33',
'tag': 36867,
'values': u'2011:06:22 12:20:33'},
'EXIF DigitalZoomRatio': {'field_length': 8,
'field_offset': 26232,
'field_type': 5,
'printable': u'1',
'tag': 41988,
'values': [[1, 1]]},
'EXIF ExifImageLength': {'field_length': 2,
'field_offset': 500,
'field_type': 3,
'printable': u'2592',
'tag': 40963,
'values': [2592]},
'EXIF ExifImageWidth': {'field_length': 2,
'field_offset': 488,
'field_type': 3,
'printable': u'3872',
'tag': 40962,
'values': [3872]},
'EXIF ExifVersion': {'field_length': 4,
'field_offset': 272,
'field_type': 7,
'printable': u'0221',
'tag': 36864,
'values': [48, 50, 50, 49]},
'EXIF ExposureBiasValue': {'field_length': 8,
'field_offset': 764,
'field_type': 10,
'printable': u'0',
'tag': 37380,
'values': [[0, 1]]},
'EXIF ExposureMode': {'field_length': 2,
'field_offset': 584,
'field_type': 3,
'printable': u'Manual Exposure',
'tag': 41986,
'values': [1]},
'EXIF ExposureProgram': {'field_length': 2,
'field_offset': 248,
'field_type': 3,
'printable': u'Manual',
'tag': 34850,
'values': [1]},
'EXIF ExposureTime': {'field_length': 8,
'field_offset': 700,
'field_type': 5,
'printable': u'1/125',
'tag': 33434,
'values': [[1, 125]]},
'EXIF FNumber': {'field_length': 8,
'field_offset': 708,
'field_type': 5,
'printable': u'10',
'tag': 33437,
'values': [[10, 1]]},
'EXIF FileSource': {'field_length': 1,
'field_offset': 536,
'field_type': 7,
'printable': u'Digital Camera',
'tag': 41728,
'values': [3]},
'EXIF Flash': {'field_length': 2,
'field_offset': 380,
'field_type': 3,
'printable': u'Flash did not fire',
'tag': 37385,
'values': [0]},
'EXIF FlashPixVersion': {'field_length': 4,
'field_offset': 464,
'field_type': 7,
'printable': u'0100',
'tag': 40960,
'values': [48, 49, 48, 48]},
'EXIF FocalLength': {'field_length': 8,
'field_offset': 780,
'field_type': 5,
'printable': u'18',
'tag': 37386,
'values': [[18, 1]]},
'EXIF FocalLengthIn35mmFilm': {'field_length': 2,
'field_offset': 620,
'field_type': 3,
'printable': u'27',
'tag': 41989,
'values': [27]},
'EXIF GainControl': {'field_length': 2,
'field_offset': 644,
'field_type': 3,
'printable': u'None',
'tag': 41991,
'values': [0]},
'EXIF ISOSpeedRatings': {'field_length': 2,
'field_offset': 260,
'field_type': 3,
'printable': u'100',
'tag': 34855,
'values': [100]},
'EXIF InteroperabilityOffset': {'field_length': 4,
'field_offset': 512,
'field_type': 4,
'printable': u'26240',
'tag': 40965,
'values': [26240]},
'EXIF LightSource': {'field_length': 2,
'field_offset': 368,
'field_type': 3,
'printable': u'Unknown',
'tag': 37384,
'values': [0]},
'EXIF MaxApertureValue': {'field_length': 8,
'field_offset': 772,
'field_type': 5,
'printable': u'18/5',
'tag': 37381,
'values': [[18, 5]]},
'EXIF MeteringMode': {'field_length': 2,
'field_offset': 356,
'field_type': 3,
'printable': u'Pattern',
'tag': 37383,
'values': [5]},
'EXIF Saturation': {'field_length': 2,
'field_offset': 668,
'field_type': 3,
'printable': u'Normal',
'tag': 41993,
'values': [0]},
'EXIF SceneCaptureType': {'field_length': 2,
'field_offset': 632,
'field_type': 3,
'printable': u'Standard',
'tag': 41990,
'values': [0]},
'EXIF SceneType': {'field_length': 1,
'field_offset': 548,
'field_type': 7,
'printable': u'Directly Photographed',
'tag': 41729,
'values': [1]},
'EXIF SensingMethod': {'field_length': 2,
'field_offset': 524,
'field_type': 3,
'printable': u'One-chip color area',
'tag': 41495,
'values': [2]},
'EXIF Sharpness': {'field_length': 2,
'field_offset': 680,
'field_type': 3,
'printable': u'Normal',
'tag': 41994,
'values': [0]},
'EXIF SubSecTime': {'field_length': 3,
'field_offset': 428,
'field_type': 2,
'printable': u'10',
'tag': 37520,
'values': u'10'},
'EXIF SubSecTimeDigitized': {'field_length': 3,
'field_offset': 452,
'field_type': 2,
'printable': u'10',
'tag': 37522,
'values': u'10'},
'EXIF SubSecTimeOriginal': {'field_length': 3,
'field_offset': 440,
'field_type': 2,
'printable': u'10',
'tag': 37521,
'values': u'10'},
'EXIF SubjectDistanceRange': {'field_length': 2,
'field_offset': 692,
'field_type': 3,
'printable': u'0',
'tag': 41996,
'values': [0]},
'EXIF WhiteBalance': {'field_length': 2,
'field_offset': 596,
'field_type': 3,
'printable': u'Auto',
'tag': 41987,
'values': [0]},
'Image DateTime': {'field_length': 20,
'field_offset': 194,
'field_type': 2,
'printable': u'2011:06:22 12:20:33',
'tag': 306,
'values': u'2011:06:22 12:20:33'},
'Image ExifOffset': {'field_length': 4,
'field_offset': 126,
'field_type': 4,
'printable': u'214',
'tag': 34665,
'values': [214]},
'Image Make': {'field_length': 18,
'field_offset': 134,
'field_type': 2,
'printable': u'NIKON CORPORATION',
'tag': 271,
'values': u'NIKON CORPORATION'},
'Image Model': {'field_length': 10,
'field_offset': 152,
'field_type': 2,
'printable': u'NIKON D80',
'tag': 272,
'values': u'NIKON D80'},
'Image Orientation': {'field_length': 2,
'field_offset': 42,
'field_type': 3,
'printable': u'Rotated 90 CCW',
'tag': 274,
'values': [6]},
'Image ResolutionUnit': {'field_length': 2,
'field_offset': 78,
'field_type': 3,
'printable': u'Pixels/Inch',
'tag': 296,
'values': [2]},
'Image Software': {'field_length': 15,
'field_offset': 178,
'field_type': 2,
'printable': u'Shotwell 0.9.3',
'tag': 305,
'values': u'Shotwell 0.9.3'},
'Image XResolution': {'field_length': 8,
'field_offset': 162,
'field_type': 5,
'printable': u'300',
'tag': 282,
'values': [[300, 1]]},
'Image YCbCrPositioning': {'field_length': 2,
'field_offset': 114,
'field_type': 3,
'printable': u'Co-sited',
'tag': 531,
'values': [2]},
'Image YResolution': {'field_length': 8,
'field_offset': 170,
'field_type': 5,
'printable': u'300',
'tag': 283,
'values': [[300, 1]]},
'Thumbnail Compression': {'field_length': 2,
'field_offset': 26280,
'field_type': 3,
'printable': u'JPEG (old-style)',
'tag': 259,
'values': [6]},
'Thumbnail ResolutionUnit': {'field_length': 2,
'field_offset': 26316,
'field_type': 3,
'printable': u'Pixels/Inch',
'tag': 296,
'values': [2]},
'Thumbnail XResolution': {'field_length': 8,
'field_offset': 26360,
'field_type': 5,
'printable': u'300',
'tag': 282,
'values': [[300, 1]]},
'Thumbnail YCbCrPositioning': {'field_length': 2,
'field_offset': 26352,
'field_type': 3,
'printable': u'Co-sited',
'tag': 531,
'values': [2]},
'Thumbnail YResolution': {'field_length': 8,
'field_offset': 26368,
'field_type': 5,
'printable': u'300',
'tag': 283,
'values': [[300, 1]]}})
for key in expected.keys():
assert useful[key] == expected[key]
def test_exif_extraction():
'''
Test EXIF extraction from a good image
'''
result = extract_exif(GOOD_JPG)
clean = clean_exif(result)
useful = get_useful(clean)
gps = get_gps_data(result)
# Do we have the result?
assert len(result) == 108
# Do we have clean data?
assert len(clean) == 105
# GPS data?
assert gps == {}
# Do we have the "useful" tags?
assert useful == {
'EXIF Flash': {
'field_type': 3,
'printable': 'No',
'field_offset': 380,
'tag': 37385,
'values': [0],
'field_length': 2},
'EXIF ExposureTime': {
'field_type': 5,
'printable': '1/125',
'field_offset': 700,
'tag': 33434,
'values': [[1, 125]],
'field_length': 8},
'EXIF FocalLength': {
'field_type': 5,
'printable': '18',
'field_offset': 780,
'tag': 37386,
'values': [[18, 1]],
'field_length': 8},
'Image Model': {
'field_type': 2,
'printable': 'NIKON D80',
'field_offset': 152,
'tag': 272,
'values': 'NIKON D80',
'field_length': 10},
'Image Make': {
'field_type': 2,
'printable': 'NIKON CORPORATION',
'field_offset': 134,
'tag': 271,
'values': 'NIKON CORPORATION',
'field_length': 18},
'EXIF ExposureMode': {
'field_type': 3,
'printable': 'Manual Exposure',
'field_offset': 584,
'tag': 41986,
'values': [1],
'field_length': 2},
'EXIF ISOSpeedRatings': {
'field_type': 3,
'printable': '100',
'field_offset': 260,
'tag': 34855,
'values': [100],
'field_length': 2},
'EXIF FNumber': {
'field_type': 5,
'printable': '10',
'field_offset': 708,
'tag': 33437,
'values': [[10, 1]],
'field_length': 8},
'EXIF UserComment': {
'field_type': 7,
'printable': 'Joar Wandborg ',
'field_offset': 26180,
'tag': 37510,
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