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// For complete examples and data files, please go to https://github.com/groupdocs-comparison/GroupDocs.Comparison-for-Java
String sourcePath = Utilities.sourcePath + sourceFile;
//stream
ArrayList<ByteArrayOutputStream> imageStream = new ArrayList<ByteArrayOutputStream>();		 
//Open  document
ComparisonPresentationBase presentation = new ComparisonPresentation(sourcePath);		 
//Set settings
ComparisonSlidesImageSettings settings = new ComparisonSlidesImageSettings();		 
//Save as Image
presentation.saveAsImages(imageStream, settings);