pdfbox convert pdf to image byte[]

Using pdfbox, is it possible to convert a PDF (or a PDF byte[]) into an image byte[]? I've looked through several examples online and the only ones I can find describe how either to directly write the converted file to the filesystem or to convert it to a Java AWT object. I'd rather not incur the IO of writing an image file to the filesystem, read into a byte[], and then delete it. So this I can do: ``` String destinationImageFormat = "jpg"; boolean success = false; InputStream is = getClass().getClassLoader().getResourceAsStream("example.pdf"); PDDocument pdf = PDDocument.load( is, true ); int resolution = 256; String password = ""; String outputPrefix = "myImageFile"; PDFImageWriter imageWriter = new PDFImageWriter(); success = imageWriter.writeImage(pdf, destinationImageFormat, password, 1, 2, outputPrefix, BufferedImage.TYPE_INT_RGB, resolution); ``` As well as this: ``` InputStream is = getClass().getClassLoader().getResourceAsStream("example.pdf"); PDDocument pdf = PDDocument.load( is, true ); List<PDPage> pages = pdf.getDocumentCatalog().getAllPages(); for ( PDPage page : pages ) { BufferedImage image = page.convertToImage(); } ``` Where I'm not clear on is how to tranform the BufferedImage into a byte[]. I know this is transformed into a file output stream in imageWriter.writeImage(), but I'm not clear on how the API works.