Package org.opencastproject.textextractor.tesseract

Class TesseractTextExtractor

java.lang.Object

org.opencastproject.textextractor.tesseract.TesseractTextExtractor

All Implemented Interfaces:

TextExtractor, org.osgi.service.cm.ManagedService

public class TesseractTextExtractor
extends Object
implements TextExtractor, org.osgi.service.cm.ManagedService

Commandline wrapper around tesseract' tesseract command.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TESSERACT_BINARY_CONFIG_KEY	Configuration property that defines the path to the tesseract binary
static final String	TESSERACT_BINARY_DEFAULT	Default name of the tesseract binary
static final String	TESSERACT_OPTS_CONFIG_KEY	Configuration property that defines additional tesseract options like the language or the pagesegmode to use.

Constructor Summary

Constructors

Constructor	Description
TesseractTextExtractor()	Creates a new tesseract command wrapper that will be using the default binary.
TesseractTextExtractor(String binary)	Creates a new tesseract command wrapper that will be using the given binary.

Method Summary

Modifier and Type	Method	Description
void	activate(org.osgi.service.component.ComponentContext cc)
List<String>	extract(File image)	Extracts text from the image and returns it as a set of lines in the text frame.
String	getAdditionalOptions()	Returns the additional options for tesseract..
void	setAdditionalOptions(String addOptions)	Sets additional options for tesseract calls.
void	updated(Dictionary properties)

Methods inherited from class java.lang.Object

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

Field Details

TESSERACT_BINARY_DEFAULT

public static final String TESSERACT_BINARY_DEFAULT

Default name of the tesseract binary

See Also:

• Constant Field Values

TESSERACT_BINARY_CONFIG_KEY

public static final String TESSERACT_BINARY_CONFIG_KEY

Configuration property that defines the path to the tesseract binary

See Also:

• Constant Field Values

TESSERACT_OPTS_CONFIG_KEY

public static final String TESSERACT_OPTS_CONFIG_KEY

Configuration property that defines additional tesseract options like the language or the pagesegmode to use. This is just appended to the command line when tesseract is called.

See Also:

• Constant Field Values

Constructor Details

TesseractTextExtractor

public TesseractTextExtractor()

Creates a new tesseract command wrapper that will be using the default binary.

TesseractTextExtractor

public TesseractTextExtractor(String binary)

Creates a new tesseract command wrapper that will be using the given binary.

Parameters:

binary - the tesseract binary

Method Details

setAdditionalOptions

public void setAdditionalOptions(String addOptions)

Sets additional options for tesseract calls.

Parameters:

addOptions -

getAdditionalOptions

public String getAdditionalOptions()

Returns the additional options for tesseract..

Returns:

additional options

extract

public List<String> extract(File image)
                     throws TextExtractorException

Extracts text from the image and returns it as a set of lines in the text frame.

Specified by:

extract in interface TextExtractor

Parameters:

image - the image

Returns:

the text

Throws:

TextExtractorException - if text extraction fails

See Also:

• TextExtractor.extract(java.io.File)

updated

public void updated(Dictionary properties)

Specified by:

updated in interface org.osgi.service.cm.ManagedService

activate

public void activate(org.osgi.service.component.ComponentContext cc)