Python API

The BANCA Database for face verification

class bob.db.banca.Database(original_directory=None, original_extension=None)

Bases: bob.db.base.SQLiteDatabase

The dataset class opens and maintains a connection opened to the Database.

It provides many different ways to probe for the characteristics of the data and for the data itself inside the database.

groups(protocol=None)

Returns the names of all registered groups

client_groups()

Returns the names of the BANCA groups. This is specific to this database which does not have separate training, development and evaluation sets.

genders()

Returns the list of genders: ‘m’ for male and ‘f’ for female

languages()

Returns the list of languages

subworld_names()

Returns all registered subworld names

subworlds()

Returns the list of subworlds

has_subworld(name)

Tells if a certain subworld is available

clients(protocol=None, groups=None, genders=None, languages=None, subworld=None)

Returns a set of clients for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the clients are identical for all protocols.

groups

The groups to which the clients belong (‘g1’, ‘g2’, ‘world’). Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

genders

The gender to which the clients belong (‘f’, ‘m’)

languages

TODO: only English is currently supported The languages spoken by the clients (‘en’,)

subworld

Specify a split of the world data (‘onethird’, ‘twothirds’) In order to be considered, ‘world’ should be in groups and only one split should be specified.

Returns: A list containing all the clients which have the given properties.

tclients(protocol=None, groups=None)

Returns a set of T-Norm clients for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the clients are identical for all protocols.

groups

The groups to which the clients belong (‘g1’, ‘g2’). Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

Returns: A list containing all the T-norm clients which have the given properties.

zclients(protocol=None, groups=None)

Returns a set of Z-Norm clients for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the clients are identical for all protocols.

groups

The groups to which the clients belong (‘g1’, ‘g2’). Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

Returns: A list containing all the Z-norm clients which have the given properties.

models(protocol=None, groups=None)

Returns a set of models for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the models are identical for all protocols.

groups

The groups to which the subjects attached to the models belong (‘g1’, ‘g2’, ‘world’) Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

Returns: A list containing all the models which have the given properties.

model_ids(protocol=None, groups=None)

Returns a set of models ids for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the models are identical for all protocols.

groups

The groups to which the subjects attached to the models belong (‘g1’, ‘g2’, ‘world’) Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

Returns: A list containing all the models ids which have the given properties.

tmodels(protocol=None, groups=None)

Returns a set of T-Norm models for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the models are identical for all protocols.

groups

The groups to which the clients belong (‘g1’, ‘g2’). Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

Returns: A list containing all the T-norm models which have the given properties.

tmodel_ids(protocol=None, groups=None)

Returns a set of T-Norm model ids for the specific query by the user.

Keyword Parameters:

protocol

Ignored since the models are identical for all protocols.

groups

The groups to which the clients belong (‘g1’, ‘g2’). Note that ‘dev’ is an alias to ‘g1’ and ‘eval’ an alias to ‘g2’

Returns: A list containing all the T-norm models which have the given properties.

has_client_id(id)

Returns True if we have a client with a certain integer identifier

client(id)

Returns the client object in the database given a certain id. Raises an error if that does not exist.

get_client_id_from_model_id(model_id, **kwargs)

Returns the client_id attached to the given model_id

Keyword Parameters:

model_id

The model_id to consider

Returns: The client_id attached to the given model_id

get_client_id_from_tmodel_id(tmodel_id, **kwargs)

Returns the client_id attached to the given T-Norm model_id

Keyword Parameters:

tmodel_id

The tmodel_id to consider

Returns: The client_id attached to the given T-Norm model_id

objects(protocol=None, purposes=None, model_ids=None, groups=None, classes=None, languages=None, subworld=None)

Returns a set of Files for the specific query by the user.

Keyword Parameters:

protocol

One of the BANCA protocols (‘P’, ‘G’, ‘Mc’, ‘Md’, ‘Ma’, ‘Ud’, ‘Ua’).

purposes

The purposes required to be retrieved (‘enroll’, ‘probe’, ‘train’) or a tuple with several of them. If ‘None’ is given (this is the default), it is considered the same as a tuple with all possible values. This field is ignored for the data from the “world” group.

model_ids

Only retrieves the files for the provided list of model ids (claimed client id). If ‘None’ is given (this is the default), no filter over the model_ids is performed.

groups

One of the groups (‘dev’, ‘eval’, ‘world’) or a tuple with several of them. If ‘None’ is given (this is the default), it is considered the same as a tuple with all possible values.

classes

The classes (types of accesses) to be retrieved (‘client’, ‘impostor’) or a tuple with several of them. If ‘None’ is given (this is the default), it is considered the same as a tuple with all possible values.

languages

The language spoken by the clients (‘en’) TODO: only English is currently supported If ‘None’ is given (this is the default), it is considered the same as a tuple with all possible values.

subworld

Specify a split of the world data (‘onethird’, ‘twothirds’) In order to be considered, ‘world’ should be in groups and only one split should be specified.

Returns: A list of files which have the given properties.

tobjects(protocol=None, model_ids=None, groups=None, languages=None)

Returns a set of Files for enrolling T-norm models for score

normalization.

Keyword Parameters:

protocol

One of the BANCA protocols (‘P’, ‘G’, ‘Mc’, ‘Md’, ‘Ma’, ‘Ud’, ‘Ua’).

model_ids

Only retrieves the files for the provided list of model ids (claimed client id). If ‘None’ is given (this is the default), no filter over the model_ids is performed.

groups

The groups to which the clients belong (‘dev’, ‘eval’).

languages

The language spoken by the clients (‘en’) TODO: only English is currently supported If ‘None’ is given (this is the default), it is considered the same as a tuple with all possible values.

Returns: A list of Files which have the given properties.

zobjects(protocol=None, model_ids=None, groups=None, languages=None)

Returns a set of Files to perform Z-norm score normalization.

Keyword Parameters:

protocol

One of the BANCA protocols (‘P’, ‘G’, ‘Mc’, ‘Md’, ‘Ma’, ‘Ud’, ‘Ua’).

model_ids

Only retrieves the files for the provided list of model ids (claimed client id). If ‘None’ is given (this is the default), no filter over the model_ids is performed.

groups

The groups to which the clients belong (‘dev’, ‘eval’).

languages

The language spoken by the clients (‘en’) TODO: only English is currently supported If ‘None’ is given (this is the default), it is considered the same as a tuple with all possible values.

Returns: A list of Files which have the given properties.

annotations(file)

Returns the annotations for the image with the given file id.

Keyword Parameters:

file

The File object to retrieve the annotations for.

Returns: the eye annotations as a dictionary {‘reye’:(y,x), ‘leye’:(y,x)}.

protocol_names()

Returns all registered protocol names

protocols()

Returns all registered protocols

has_protocol(name)

Tells if a certain protocol is available

protocol(name)

Returns the protocol object in the database given a certain name. Raises an error if that does not exist.

protocol_purposes()

Returns all registered protocol purposes

purposes()

Returns the list of allowed purposes

t_model_ids(protocol, groups='dev', **kwargs)

Returns the list of model ids used for T-Norm of the given protocol for the given group that satisfy your query. For possible keyword arguments, please check the tmodel_ids() function.

t_enroll_files(protocol, model_id, groups='dev', **kwargs)

Returns the list of T-Norm model enrollment File objects from the given model id of the given protocol for the given group that satisfy your query. For possible keyword arguments, please check the tobjects() function.

z_probe_files(protocol, groups='dev', **kwargs)

Returns the list of Z-Norm probe File objects to probe the model with the given model id of the given protocol for the given group that satisfy your query. For possible keyword arguments, please check the zobjects() function.

class bob.db.banca.Client(id, gender, group, language)

Bases: sqlalchemy.ext.declarative.api.Base

Database clients, marked by an integer identifier and the group they belong to

gender_choices = ('m', 'f')

group_choices = ('g1', 'g2', 'world')

language_choices = ('en',)

id

gender

sgroup

language

class bob.db.banca.Subworld(name)

Bases: sqlalchemy.ext.declarative.api.Base

Database clients belonging to the world group are split in two disjoint subworlds, onethird and twothirds

id

clients

name

class bob.db.banca.File(client_id, path, claimed_id, shot_id, session_id)

Bases: sqlalchemy.ext.declarative.api.Base, bob.db.base.File

Generic file container

id

path

real_client

annotation

client_id

claimed_id

shot_id

session_id

class bob.db.banca.Protocol(name)

Bases: sqlalchemy.ext.declarative.api.Base

BANCA protocols

id

name

class bob.db.banca.ProtocolPurpose(protocol_id, sgroup, purpose)

Bases: sqlalchemy.ext.declarative.api.Base

BANCA protocol purposes

id

group_choices = ('world', 'dev', 'eval')

purpose_choices = ('train', 'enroll', 'probe')

protocol

files

protocol_id

sgroup

purpose

class bob.db.banca.Annotation(file_id, eyes)

Bases: sqlalchemy.ext.declarative.api.Base

Annotations of the BANCA database consists only of the left and right eye positions. There is exactly one annotation for each file.

id

file_id

re_x

re_y

le_x

le_y

bob.db.banca.get_config()

Returns a string containing the configuration information.