java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Arrays.java:3236)
	at java.io.ByteArrayOutputStream.toByteArray(ByteArrayOutputStream.java:191)
	at com.itextpdf.text.pdf.PdfReader.decodePredictor(PdfReader.java:2101)
	at com.itextpdf.text.pdf.FilterHandlers$Filter_FLATEDECODE.decode(FilterHandlers.java:108)
	at com.itextpdf.text.pdf.PdfReader.decodeBytes(PdfReader.java:2619)
	at com.itextpdf.text.pdf.parser.PdfImageObject.<init>(PdfImageObject.java:189)
	at com.itextpdf.text.pdf.parser.PdfImageObject.<init>(PdfImageObject.java:168)
	at com.itextpdf.text.pdf.parser.ImageRenderInfo.prepareImageObject(ImageRenderInfo.java:150)
	at com.itextpdf.text.pdf.parser.ImageRenderInfo.getImage(ImageRenderInfo.java:140)
	at pl.edu.icm.cermine.structure.ITextCharacterExtractor$BxDocumentCreator.renderImage(ITextCharacterExtractor.java:366)
	at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor$ImageXObjectDoHandler.handleXObject(PdfContentStreamProcessor.java:1311)
	at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.displayXObject(PdfContentStreamProcessor.java:375)
	at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.access$6100(PdfContentStreamProcessor.java:83)
	at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor$Do.invoke(PdfContentStreamProcessor.java:1023)
	at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.invokeOperator(PdfContentStreamProcessor.java:310)
	at com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.processContent(PdfContentStreamProcessor.java:448)
	at pl.edu.icm.cermine.structure.ITextCharacterExtractor.extractCharacters(ITextCharacterExtractor.java:112)
	at pl.edu.icm.cermine.ExtractionUtils.extractCharacters(ExtractionUtils.java:60)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:346)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:339)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:339)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:339)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:339)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:339)
	at pl.edu.icm.cermine.InternalContentExtractor.doWork(InternalContentExtractor.java:339)
	at pl.edu.icm.cermine.InternalContentExtractor.getContentAsNLM(InternalContentExtractor.java:299)
	at pl.edu.icm.cermine.ContentExtractor.getContentAsNLM(ContentExtractor.java:662)
	at pl.edu.icm.cermine.ContentExtractor.getContentAsNLM(ContentExtractor.java:678)
	at eu.dnetlib.iis.wf.metadataextraction.MetadataExtractorMain.processFile(MetadataExtractorMain.java:112)
	at eu.dnetlib.iis.wf.metadataextraction.MetadataExtractorMain.process(MetadataExtractorMain.java:88)
	at eu.dnetlib.iis.wf.metadataextraction.MetadataExtractorMain.main(MetadataExtractorMain.java:60)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)