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// For complete examples and data files, please go to https://github.com/groupdocs-comparison/GroupDocs.Comparison-for-Java
InputStream sourceStream = new FileInputStream(Utilities.sourcePath + sourceFile);
InputStream targetStream = new FileInputStream(Utilities.targetPath + targetFile);
		 
ComparisonDjvuImage sourceImage = new ComparisonDjvuImage(sourceStream);
ComparisonDjvuImage targetImage = new ComparisonDjvuImage(targetStream);

ImagingComparisonSettings settings = new ImagingComparisonSettings();

//Compare
IImageCompareResult cr = sourceImage.compareWith(targetImage, settings);
IPdfDocument resultPdf = cr.getPdfDocument();

//save results into a file
resultPdf.save(Utilities.outputFileName(extension));
sourceStream.close();
targetStream.close();