Recognizer

Classes
class	face_sdk.modules.recognizer.MatchResult
	Interface object for creating and matching templates. More...
class	face_sdk.modules.recognizer.SearchResult
	Result of searching the Template query in the TemplatesIndex. More...
class	face_sdk.modules.recognizer.SearchAccelerationType
	Types of search acceleration. More...
class	face_sdk.modules.recognizer.Recognizer
	Interface object for creating and matching templates. More...

Functions
def	face_sdk.modules.recognizer.Recognizer.processing
	Create a template. More...
def	face_sdk.modules.recognizer.Recognizer.verify_match
	Compare two templates. More...
def	face_sdk.modules.recognizer.Recognizer.create_index
	Create the TemplatesIndex for quick search. More...
def	face_sdk.modules.recognizer.Recognizer.get_method_name
	Get a method name. More...
def	face_sdk.modules.recognizer.Recognizer.search
	Search for the k nearest Templates in the TemplatesIndex. More...
def	face_sdk.modules.recognizer.Recognizer.load_template
	Load the template. More...
def	face_sdk.modules.recognizer.Recognizer.choose_representative_templates_set
	Choose templates set that best represent original templates. More...
def	face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_distance_threshold
	Get a point on the ROC curve with a given distance threshold. More...
def	face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_far
	Get a point on the ROC curve with a given false acceptance rate (FAR). More...
def	face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_frr
	Get a point on the ROC curve with a given false rejection rate (FRR). More...
def	face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_score_threshold
	Get a point on the ROC curve with a given similarity score threshold. More...

Detailed Description

Function Documentation

def face_sdk.modules.recognizer.Recognizer.choose_representative_templates_set	(		self,
			set_size
	)

Choose templates set that best represent original templates.

Parameters

[in]	set_size	Required set size.
[in]	templates	Original templates.
[in]	inviolable_templates_indexes	Indexes of templates, required to be included in the result set.

Returns

Indexes of templates that make up the result set.

def face_sdk.modules.recognizer.Recognizer.create_index	(		self,
			templates
	)

Create the TemplatesIndex for quick search.

The total size of all indexes is limited by the license.

Parameters

[in]	templates	Vector of templates for creating an index.
[in]	search_threads_count	Count of threads that will be used while searching in this index.
[in]	reserve_queries_count	Integer passed to TemplatesIndex.reserve_search_memory, which is called with the created index.

Returns

Created index.

def face_sdk.modules.recognizer.Recognizer.get_method_name	(		self,
			str
	)

Get a method name.

Thread-safe.

Returns

The name of the method.

def face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_distance_threshold	(		self,
			distance_threshold
	)

Get a point on the ROC curve with a given distance threshold.

Thread-safe.

Returns

Point on the ROC curve in the form of a MatchResult struct.

def face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_far	(		self,
			desired_far
	)

Get a point on the ROC curve with a given false acceptance rate (FAR).

Thread-safe.

Returns

Point on the ROC curve in the form of a MatchResult struct.

def face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_frr	(		self,
			desired_frr
	)

Get a point on the ROC curve with a given false rejection rate (FRR).

Thread-safe.

Returns

Point on the ROC curve in the form of a MatchResult struct.

def face_sdk.modules.recognizer.Recognizer.get_roc_curve_point_by_score_threshold	(		self,
			score_threshold
	)

Get a point on the ROC curve with a given similarity score threshold.

Thread-safe.

Returns

Point on the ROC curve in the form of a MatchResult struct.

def face_sdk.modules.recognizer.Recognizer.load_template	(		self,
			binary_stream
	)

Load the template.

The format is platform-independent. Only the templates that were created with the same method (i.e. with the same ini_file) can be loaded.

Parameters

[in]

binary_stream

Input stream object. The file stream (std::ifstream) must be opened with the std::ios_base::binary flag.

Returns

Loaded template.

def face_sdk.modules.recognizer.Recognizer.processing	(		self,
			sample
	)

Create a template.

Parameters

[in]

sample

Face sample. At the moment, all methods can only be used with frontal samples.

Returns

Created template.

def face_sdk.modules.recognizer.Recognizer.search	(		self,
			queries_templates
	)

Search for the k nearest Templates in the TemplatesIndex.

The search time depends on k and the size of the TemplatesIndex.

Parameters

[in]	query_template	The Template query.
[in]	templates_index	TemplatesIndex for search.
[in]	k	Count of the nearest templates for search.
[in]	acceleration	Acceleration type.

Returns

Vector with min(k, templates_index.size()) elements in ascending order of distance to the query_template.

def face_sdk.modules.recognizer.Recognizer.verify_match	(		self,
			template1
	)

Compare two templates.

The order of templates does not matter. Only the templates that were created with the same method (i.e. with the same ini_file) can be loaded.

Parameters

[in]	template1	Template created by the same method.
[in]	template2	Template created by the same method.

Returns

Result of the matching.