com.qoppa.ocr

Class TessJNI

java.lang.Object

com.qoppa.ocr.TessJNI

public class TessJNI
extends Object

This class provides a native interface to the Tesseract OCR engine.

Author:

Qoppa Software

Constructor Summary

Constructors

Constructor and Description
TessJNI()

Method Summary

Methods

Modifier and Type	Method and Description
String	performOCR(String language, BufferedImage image) Performs OCR on an image and returns an hOCR result string.
String	performOCR(String language, PDFPage pdfPage, int dpi) Performs OCR on a PDF page and returns an hOCR result string.
String	performOCR(String language, PDFPage pdfPage, int dpi, OCROptions options) Performs OCR on a PDF page and returns an hOCR result string.

Methods inherited from class java.lang.Object

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

Constructor Detail

TessJNI

public TessJNI()

Method Detail

performOCR

public String performOCR(String language,
                BufferedImage image)
                  throws OCRException

Performs OCR on an image and returns an hOCR result string. This method makes a call to the Tesseract OCR engine to perform character recognition on the image. The results are in hOCR format, a standard format for OCR results that includes recognized text as well as location and size information.

Parameters:

language - The language to use in performing the OCR. This can be multiple languages separated by a plus character (ex. "eng+fra")

image - The image to process

Returns:

The OCR results, in hOCR format.

Throws:

OCRException

performOCR

public String performOCR(String language,
                PDFPage pdfPage,
                int dpi)
                  throws PDFException,
                         OCRException

Performs OCR on a PDF page and returns an hOCR result string. This method converts the PDF page to an image and then makes a call to the Tesseract OCR engine to perform character recognition on the image. The results are in hOCR format, a standard format for OCR results that includes recognized text as well as location and size information.

Parameters:

language - The language to use in performing the OCR. This can be multiple languages separated a plus character (ex. "eng+fra").

pdfPage - The PDF page to process.

dpi - Dots per inch at which to render the image.

Returns:

The OCR results, in hOCR format.

Throws:

OCRException

PDFException

performOCR

public String performOCR(String language,
                PDFPage pdfPage,
                int dpi,
                OCROptions options)
                  throws PDFException,
                         OCRException

Performs OCR on a PDF page and returns an hOCR result string. This method converts the PDF page to an image and then makes a call to the Tesseract OCR engine to perform character recognition on the image. The results are in hOCR format, a standard format for OCR results that includes recognized text as well as location and size information.

Parameters:

language - The language to use in performing the OCR. This can be multiple languages separated a plus character (ex. "eng+fra").

pdfPage - The PDF page to process.

dpi - Dots per inch at which to render the image.

options - The OCR options.

Returns:

The OCR results, in hOCR format.

Throws:

PDFException

OCRException