Added the high level database interface HLDI for the Replay-Mobile DB

bob/pad/face/database/__init__.py

 from .replay import ReplayPadDatabase
+from .replay_mobile import ReplayMobilePadDatabase
 
 # gets sphinx autodoc done right - don't remove it
 def __appropriate__(*args):
@@ -16,6 +17,7 @@ def __appropriate__(*args):
 
 __appropriate__(
     ReplayPadDatabase,
+    ReplayMobilePadDatabase,
     )
 
 __all__ = [_ for _ in dir() if not _.startswith('_')]

bob/pad/face/database/replay.py

@@ -10,6 +10,7 @@ from bob.pad.base.database import PadFile # Used in ReplayPadFile class
 
 from bob.pad.base.database import PadDatabase
 
+
 #==============================================================================
 
 class ReplayPadFile(PadFile):
@@ -44,11 +45,11 @@ class ReplayPadFile(PadFile):
         super(ReplayPadFile, self).__init__(client_id=f.client_id, path=f.path,
                                             attack_type=attack_type, file_id=f.id)
 
-    #==========================================================================
 
+    #==========================================================================
     def load(self, directory=None, extension='.mov'):
         """
-        Overridden version of the load method defined in the ``bob.db.base.File``.
+        Overridden version of the load method defined in the ``PadFile``.
 
         **Parameters:**
 
@@ -73,8 +74,8 @@ class ReplayPadFile(PadFile):
 
         return video_data # video data
 
-#==============================================================================
 
+#==============================================================================
 class ReplayPadDatabase(PadDatabase):
     """
     A high level implementation of the Database class for the REPLAY-ATTACK database.
@@ -119,8 +120,8 @@ class ReplayPadDatabase(PadDatabase):
             original_extension = original_extension,
             **kwargs)
 
-    #==========================================================================
 
+    #==========================================================================
     def objects(self, groups=None, protocol=None, purposes=None, model_ids=None, **kwargs):
         """
         This function returns lists of ReplayPadFile objects, which fulfill the given restrictions.
@@ -158,8 +159,8 @@ class ReplayPadDatabase(PadDatabase):
         files = [ReplayPadFile(f) for f in files]
         return files
 
-    #==========================================================================
 
+    #==========================================================================
     def annotations(self, f):
         """
         Return annotations for a given file object ``f``, which is an instance

bob/pad/face/database/replay_mobile.py

+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+
+#==============================================================================
+import bob.bio.video # Used in ReplayMobilePadFile class
+
+from bob.pad.base.database import PadFile # Used in ReplayMobilePadFile class
+
+from bob.pad.base.database import PadDatabase
+
+
+#==============================================================================
+class ReplayMobilePadFile(PadFile):
+    """
+    A high level implementation of the File class for the Replay-Mobile database.
+    """
+
+    def __init__(self, f):
+        """
+        **Parameters:**
+
+        ``f`` : :py:class:`object`
+            An instance of the File class defined in the low level db interface
+            of the Replay-Mobile database, in the bob.db.replaymobile.models.py file.
+        """
+
+        self.f = f
+        # this f is actually an instance of the File class that is defined in
+        # bob.db.replaymobile.models and the PadFile class here needs
+        # client_id, path, attack_type, file_id for initialization. We have to
+        # convert information here and provide them to PadFile. attack_type is a
+        # little tricky to get here. Based on the documentation of PadFile:
+        # In cased of a spoofed data, this parameter should indicate what kind of spoofed attack it is.
+        # The default None value is interpreted that the PadFile is a genuine or real sample.
+        if f.is_real():
+            attack_type = None
+        else:
+            attack_type = 'attack'
+        # attack_type is a string and I decided to make it like this for this
+        # particular database. You can do whatever you want for your own database.
+
+        super(ReplayMobilePadFile, self).__init__(client_id=f.client_id, path=f.path,
+                                            attack_type=attack_type, file_id=f.id)
+
+
+    #==========================================================================
+    def convert_arr_to_frame_cont(self, data):
+        """
+        This function converts an input 4D array with frames into FrameContainer,
+        where each frame is an RGB image. The dimensionality of the input array
+        is [N_frames, 3, N_rows, N_cols].
+
+        **Parameters:**
+
+        ``data`` : 4D :py:class:`numpy.ndarray`
+            An input 4D array with frames of the dimensionality:
+            [N_frames, 3, N_rows, N_cols].
+
+        **Returns:**
+
+        ``frames`` : FrameContainer
+            Resulting FrameContainer containing RGB frames.
+        """
+
+        frames = bob.bio.video.FrameContainer() # initialize the FrameContainer
+
+        for idx, sample in enumerate(data):
+
+            frames.add(idx, sample)
+
+        return frames
+
+
+    #==========================================================================
+    def load(self, directory=None, extension='.mov'):
+        """
+        Overridden version of the load method defined in the ``PadFile``.
+
+        **Parameters:**
+
+        ``directory`` : :py:class:`str`
+            String containing the path to the Replay-Mobile database.
+
+        ``extension`` : :py:class:`str`
+            Extension of the video files in the Replay-Mobile database.
+
+        **Returns:**
+
+        ``video_data`` : FrameContainer
+            Video data stored in the FrameContainer, see ``bob.bio.video.utils.FrameContainer``
+            for further details.
+        """
+
+        video_data_array = self.f.load(directory = directory,
+                                       extension = extension)
+
+        video_data = self.convert_arr_to_frame_cont(video_data_array) # the result is now a FrameContainer
+
+        return video_data
+
+
+#==============================================================================
+class ReplayMobilePadDatabase(PadDatabase):
+    """
+    A high level implementation of the Database class for the Replay-Mobile database.
+    """
+
+    def __init__(
+        self,
+        protocol='grandtest', # grandtest is the default protocol for this database
+        original_directory=None,
+        original_extension=None,
+        **kwargs):
+        """
+        **Parameters:**
+
+        ``protocol`` : :py:class:`str` or ``None``
+            The name of the protocol that defines the default experimental setup for this database.
+
+        ``original_directory`` : :py:class:`str`
+            The directory where the original data of the database are stored.
+
+        ``original_extension`` : :py:class:`str`
+            The file name extension of the original data.
+
+        ``kwargs``
+            The arguments of the :py:class:`bob.bio.base.database.BioDatabase` base class constructor.
+        """
+
+        from bob.db.replaymobile import Database as LowLevelDatabase
+
+        self.db = LowLevelDatabase()
+
+        # Since the high level API expects different group names than what the low
+        # level API offers, you need to convert them when necessary
+        self.low_level_group_names = ('train', 'devel', 'test') # group names in the low-level database interface
+        self.high_level_group_names = ('train', 'dev', 'eval') # names are expected to be like that in objects() function
+
+        # Always use super to call parent class methods.
+        super(ReplayMobilePadDatabase, self).__init__(
+            name = 'replay-mobile',
+            protocol = protocol,
+            original_directory = original_directory,
+            original_extension = original_extension,
+            **kwargs)
+
+
+    #==========================================================================
+    def objects(self, groups=None, protocol=None, purposes=None, model_ids=None, **kwargs):
+        """
+        This function returns lists of ReplayMobilePadFile objects, which fulfill the given restrictions.
+
+        Keyword parameters:
+
+        ``groups`` : :py:class:`str`
+            OR a list of strings.
+            The groups of which the clients should be returned.
+            Usually, groups are one or more elements of ('train', 'dev', 'eval')
+
+        ``protocol`` : :py:class:`str`
+            The protocol for which the clients should be retrieved.
+            The protocol is dependent on your database.
+            If you do not have protocols defined, just ignore this field.
+
+        ``purposes`` : :py:class:`str`
+            OR a list of strings.
+            The purposes for which File objects should be retrieved.
+            Usually it is either 'real' or 'attack'.
+
+        ``model_ids``
+            This parameter is not supported in PAD databases yet
+
+        **Returns:**
+
+        ``files`` : :py:class:`str`
+            A list of ReplayMobilePadFile objects.
+        """
+
+        # Convert group names to low-level group names here.
+        groups = self.convert_names_to_lowlevel(groups, self.low_level_group_names, self.high_level_group_names)
+        # Since this database was designed for PAD experiments, nothing special
+        # needs to be done here.
+        files = self.db.objects(protocol=protocol, groups=groups, cls=purposes, **kwargs)
+
+        files = [ReplayMobilePadFile(f) for f in files]
+
+        return files
+
+
+    #==========================================================================
+    def annotations(self, f):
+        """
+        Return annotations for a given file object ``f``, which is an instance
+        of ``ReplayMobilePadFile`` defined in the HLDI of the Replay-Mobile DB.
+        The ``load()`` method of ``ReplayMobilePadFile`` class (see above)
+        returns a video, therefore this method returns bounding-box annotations
+        for each video frame. The annotations are returned as dictionary of dictionaries.
+
+        **Parameters:**
+
+        ``f`` : :py:class:`object`
+            An instance of ``ReplayMobilePadFile`` defined above.
+
+        **Returns:**
+
+        ``annotations`` : :py:class:`dict`
+            A dictionary containing the annotations for each frame in the video.
+            Dictionary structure: ``annotations = {'1': frame1_dict, '2': frame1_dict, ...}``.
+            Where ``frameN_dict = {'topleft': (row, col), 'bottomright': (row, col)}``
+            is the dictionary defining the coordinates of the face bounding box in frame N.
+        """
+
+        annots = f.f.bbx(directory=self.original_directory) # numpy array containing the face bounding box data for each video frame, returned data format described in the f.bbx() method of the low level interface
+
+        annotations = {} # dictionary to return
+
+        for fn, frame_annots in enumerate(annots):
+
+            topleft = (frame_annots[1], frame_annots[0])
+            bottomright = (frame_annots[1] + frame_annots[3], frame_annots[0] + frame_annots[2])
+
+            annotations[str(fn)] = {'topleft': topleft, 'bottomright': bottomright}
+
+        return annotations
+