org.apache.tika.parser.recognition.tf

Class TensorflowImageRecParser

java.lang.Object

org.apache.tika.parser.AbstractParser

org.apache.tika.parser.external.ExternalParser

org.apache.tika.parser.recognition.tf.TensorflowImageRecParser

All Implemented Interfaces:

java.io.Serializable, Initializable, Parser, ObjectRecogniser

public class TensorflowImageRecParser
extends ExternalParser
implements ObjectRecogniser

This is an implementation of ObjectRecogniser powered by Tensorflow convolutional neural network (CNN). This implementation binds to Python API using ExternalParser.
// NOTE: This is a proof of concept for an efficient implementation using JNI binding to Tensorflow's C++ api.

Environment Setup:

1. Python must be available
2. Tensorflow must be available for import by the python script. Setup Instructions here
3. All dependencies of tensor flow (such as numpy) must also be available. Follow the image recognition guide and make sure it works

Since:

Apache Tika 1.14

See Also:

TensorflowRESTRecogniser, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.tika.parser.external.ExternalParser

ExternalParser.LineConsumer

Field Summary

Fields inherited from class org.apache.tika.parser.external.ExternalParser

INPUT_FILE_TOKEN, OUTPUT_FILE_TOKEN

Constructor Summary

Constructors

Constructor and Description
TensorflowImageRecParser()

Method Summary

Modifier and Type	Method and Description
void	checkInitialization(InitializableProblemHandler handler)
java.util.Set<MediaType>	getSupportedMimes() The mimes supported by this recogniser
void	initialize(java.util.Map<java.lang.String,Param> params) This is the hook for configuring the recogniser
boolean	isAvailable() Is this service available
java.util.List<RecognisedObject>	recognise(java.io.InputStream stream, org.xml.sax.ContentHandler handler, Metadata metadata, ParseContext context) Recognise the objects in the stream

Methods inherited from class org.apache.tika.parser.external.ExternalParser

check, check, getCommand, getIgnoredLineConsumer, getMetadataExtractionPatterns, getSupportedTypes, getSupportedTypes, parse, setCommand, setIgnoredLineConsumer, setMetadataExtractionPatterns, setSupportedTypes

Methods inherited from class org.apache.tika.parser.AbstractParser

parse

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TensorflowImageRecParser

public TensorflowImageRecParser()

Method Detail

getSupportedMimes

public java.util.Set<MediaType> getSupportedMimes()

Description copied from interface: ObjectRecogniser

The mimes supported by this recogniser

Specified by:

getSupportedMimes in interface ObjectRecogniser

Returns:

set of mediatypes

isAvailable

public boolean isAvailable()

Description copied from interface: ObjectRecogniser

Is this service available

Specified by:

isAvailable in interface ObjectRecogniser

Returns:

true when the service is available, false otherwise

initialize

public void initialize(java.util.Map<java.lang.String,Param> params)
                throws TikaConfigException

Description copied from interface: ObjectRecogniser

This is the hook for configuring the recogniser

Specified by:

initialize in interface Initializable

Specified by:

initialize in interface ObjectRecogniser

Parameters:

params - configuration instance in the form of context

Throws:

TikaConfigException - when there is an issue with configuration

checkInitialization

public void checkInitialization(InitializableProblemHandler handler)
                         throws TikaConfigException

Specified by:

checkInitialization in interface Initializable

Parameters:

handler - if there is a problem and no custom initializableProblemHandler has been configured via Initializable parameters, this is called to respond.

Throws:

TikaConfigException

recognise

public java.util.List<RecognisedObject> recognise(java.io.InputStream stream,
                                                  org.xml.sax.ContentHandler handler,
                                                  Metadata metadata,
                                                  ParseContext context)
                                           throws java.io.IOException,
                                                  org.xml.sax.SAXException,
                                                  TikaException

Description copied from interface: ObjectRecogniser

Recognise the objects in the stream

Specified by:

recognise in interface ObjectRecogniser

Parameters:

stream - content stream

handler - tika's content handler

metadata - metadata instance

context - parser context

Returns:

List of RecognisedObjects

Throws:

java.io.IOException - when an I/O error occurs

org.xml.sax.SAXException - when an issue with XML occurs

TikaException - any generic error