def __init__(self,
image_lib_path=os.path.realpath(os.path.join(prefix, constants.IMAGE_LIBRARY_PATH)),
confidence=constants.confidence):
self.image_lib_path = image_lib_path
self.hashes = []
self.img_set = DisjointSet()
self.confidence = confidence
self.refresh()
def refresh(self):
self.hashes = []
self.img_set = DisjointSet()
for filename in os.listdir(self.image_lib_path):
print filename
_hash = get_hash(os.path.join(self.image_lib_path, filename))
self.hashes.append((_hash, filename.decode(filesystem_encoding).encode('utf-8')))
for pair in self.hashes:
self.img_set.union(pair, pair)
for (h1, f1), (h2, f2) in combinations(self.hashes, 2):
if self._resemble(h1, h2):
self.img_set.union((h1, f1), (h2, f2))
class ImageLibrary(object):
def __init__(self,
image_lib_path=os.path.realpath(os.path.join(prefix, constants.IMAGE_LIBRARY_PATH)),
confidence=constants.confidence):
self.image_lib_path = image_lib_path
self.hashes = []
self.img_set = DisjointSet()
self.confidence = confidence
self.refresh()
def refresh(self):
self.hashes = []
self.img_set = DisjointSet()
for filename in os.listdir(self.image_lib_path):
print filename
_hash = get_hash(os.path.join(self.image_lib_path, filename))
self.hashes.append((_hash, filename.decode(filesystem_encoding).encode('utf-8')))
for pair in self.hashes:
self.img_set.union(pair, pair)
for (h1, f1), (h2, f2) in combinations(self.hashes, 2):
if self._resemble(h1, h2):
self.img_set.union((h1, f1), (h2, f2))
def append(self, image_filename):
_hash = get_hash(os.path.join(self.image_lib_path, image_filename))
pair = _hash, image_filename
self.hashes.append(pair)
for cur_hash, f in self.hashes:
if self._resemble(_hash, cur_hash):
self.img_set.union(pair, (cur_hash, f))
self.img_set.union(pair, pair)
def _resemble(self, h1, h2):
return bin(h1 ^ h2).count('1') <= self.confidence
def _query(self, _hash):
for h, f in self.hashes:
if self._resemble(h, _hash):
pair = self.img_set.get_equiv_elem((h, f))
return self.img_set.d[self.img_set.get_equiv_elem(pair)]
return []
def query(self, image_handle=None, image_path=None, image_url=None, image_hash=None):
print 'in query'
if image_hash:
print 'image hash'
return self._query(image_hash)
if image_handle:
print 'image handle'
return self._query(get_hash(image_handle))
if image_path:
print 'image path'
return self._query(get_hash(image_path))
if image_url:
print 'image url'
print 'retrieving image from %s' % image_url
raw_image = urllib2.urlopen(image_url).read()
print 'image retrieved'
image_handle = StringIO(raw_image)
return self._query(get_hash(image_handle))
return []
def all(self):
return reduce(operator.or_, self.img_set.d.values(), set())
def get_thumbnail(self, filename, size=(75, 75), anti_alias=True):
path = os.path.realpath(os.path.join(self.image_lib_path, filename))
image = Image.open(path)
image.thumbnail(size, Image.ANTIALIAS if anti_alias else Image.NEAREST)
thumbnail = StringIO()
image.save(thumbnail, image.format)
thumbnail.seek(0)
return thumbnail
