cz.muni.pdfjbim
Class PdfImageExtractor

java.lang.Object
  cz.muni.pdfjbim.PdfImageExtractor

public class PdfImageExtractor
extends Object

class allowing extraction of images from a PDF document

Author:

Radim Hatlapatka (hata.radim@gmail.com)

Constructor Summary

PdfImageExtractor()

Method Summary

void	extractImages(File pdfFile, String password, Set<Integer> pagesToProcess, Boolean binarize) This method extracts images from PDF
void	extractImages(InputStream is, String password, Set<Integer> pagesToProcess, Boolean binarize) This method extracts images by going through all COSObjects pointed from xref table
static void	extractImages(String filename) Parses a PDF and extracts all the images.
void	extractImages(String pdfFile, String password, Set<Integer> pagesToProcess, Boolean binarize) This method extracts images from PDF
void	extractImagesUsingPdfObjectAccess(String pdfFile, String prefix, String password, Set<Integer> pagesToProcess, Boolean binarize) Deprecated. -- do not use doesn't work properly yet This method extracts images by going through PDF tree structure
void	extractImagesUsingPdfParser(InputStream is, String prefix, String password, Set<Integer> pagesToProcess, Boolean binarize) This method extracts images by going through all COSObjects pointed from xref table
void	extractJbig2Images(InputStream is) Deprecated.
List<String>	getNamesOfImages()
List<PdfImageInformation>	getOriginalImageInformations()
String	getUniqueFileName(String prefix, String suffix) get file name that is not used right now

Methods inherited from class java.lang.Object

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

Constructor Detail

PdfImageExtractor

public PdfImageExtractor()

Method Detail

getNamesOfImages

public List<String> getNamesOfImages()

Returns:

names of images in a list

getOriginalImageInformations

public List<PdfImageInformation> getOriginalImageInformations()

Returns:

list of informations about images

extractImages

public void extractImages(File pdfFile,
                          String password,
                          Set<Integer> pagesToProcess,
                          Boolean binarize)
                   throws PdfRecompressionException

This method extracts images from PDF

Parameters:

pdfFile - input PDF file

password - password for access to PDF if needed

pagesToProcess - list of pages which should be processed if null given => processed all pages -- not working yet

binarize - -- enables processing of nonbitonal images as well (LZW is still not processed because of output with inverted colors)

Throws:

PdfRecompressionException - if problem to extract images from PDF

extractImages

public void extractImages(String pdfFile,
                          String password,
                          Set<Integer> pagesToProcess,
                          Boolean binarize)
                   throws PdfRecompressionException

This method extracts images from PDF

Parameters:

pdfFile - name of input PDF file

password - password for access to PDF if needed

pagesToProcess - list of pages which should be processed if null given => processed all pages -- not working yet

binarize - -- enables processing of nonbitonal images as well (LZW is still not processed because of output with inverted colors)

Throws:

PdfRecompressionException - if problem to extract images from PDF

extractImages

public void extractImages(InputStream is,
                          String password,
                          Set<Integer> pagesToProcess,
                          Boolean binarize)
                   throws PdfRecompressionException

This method extracts images by going through all COSObjects pointed from xref table

Parameters:

is - input stream containing input PDF file

password - password for access to PDF if needed

pagesToProcess - list of pages which should be processed if null given => processed all pages -- not working yet

binarize - -- enables processing of nonbitonal images as well (LZW is still not processed because of output with inverted colors)

Throws:

PdfRecompressionException - if problem to extract images from PDF

extractImages

public static void extractImages(String filename)
                          throws IOException,
                                 com.itextpdf.text.DocumentException

Parses a PDF and extracts all the images.

Parameters:

filename -

Throws:

IOException

com.itextpdf.text.DocumentException

extractJbig2Images

public void extractJbig2Images(InputStream is)
                        throws PdfRecompressionException

Deprecated.

Extracts JBIG2Images from Input stream even if they are stored together with global dictionary in separate PDF object doesn't work yet, its in development stage

Parameters:

is -

Throws:

PdfRecompressionException

extractImagesUsingPdfParser

public void extractImagesUsingPdfParser(InputStream is,
                                        String prefix,
                                        String password,
                                        Set<Integer> pagesToProcess,
                                        Boolean binarize)
                                 throws PdfRecompressionException

This method extracts images by going through all COSObjects pointed from xref table

Parameters:

is - input stream containing PDF file

prefix - output basename for images

password - password for access to PDF if needed

pagesToProcess - list of pages which should be processed if null given => processed all pages -- not working yet

binarize - -- enables processing of nonbitonal images as well (LZW is still not processed because of output with inverted colors)

Throws:

PdfRecompressionException - if problem to extract images from PDF

extractImagesUsingPdfObjectAccess

public void extractImagesUsingPdfObjectAccess(String pdfFile,
                                              String prefix,
                                              String password,
                                              Set<Integer> pagesToProcess,
                                              Boolean binarize)
                                       throws PdfRecompressionException

Deprecated. -- do not use doesn't work properly yet This method extracts images by going through PDF tree structure

Parameters:

pdfFile - name of input PDF file

prefix -

password - password for access to PDF if needed

pagesToProcess - list of pages which should be processed if null given => processed all pages -- not working yet // * @param silent -- if true error messages are not written to output otherwise they are

binarize - -- enables processing of nonbitonal images as well (LZW is still not processed because of output with inverted colors)

Throws:

PdfRecompressionException - if problem to extract images from PDF

getUniqueFileName

public String getUniqueFileName(String prefix,
                                String suffix)

get file name that is not used right now

Parameters:

prefix - represents prefix of the name of file

suffix - represents suffix of the name of file

Returns:

file name that is not used right now