java.awt.Rectangle area = new java.awt.Rectangle(0, 0, img2.getWidth(), img2.getHeight());

            com.aspose.omr.imageprocessing.GrayscaleAlgorithm gs = new com.aspose.omr.imageprocessing.GrayscaleAlgorithm();
            gs.process(img2, area);

// Binarization
            com.aspose.omr.imageprocessing.AverageThresholdAlgorithm threshold = new com.aspose.omr.imageprocessing.AverageThresholdAlgorithm();
            threshold.process(img2, area);

// Skew correction
            com.aspose.omr.imageprocessing.SkewCorrectionAlgorithm skewCorrection = new com.aspose.omr.imageprocessing.SkewCorrectionAlgorithm();
            skewCorrection.process(img2, area);

// save image
            java.io.File fileObj = new java.io.File("result.jpg");
            try {
                ImageIO.write(img2.asBitmap(), "jpg", fileObj);
            } catch (IOException ex) {
                Logger.getLogger(Scanner.class.getName()).log(Level.SEVERE, null, ex);
            }

//Get skew degree of the image
                        double degree = engine.getSkewDegree(img2);

// Rotate image to correct skew
                        engine.rotateImage(img2, degree);

// Save image
                        File file = new java.io.File("result.jpg");
                        try {
                            ImageIO.write(img2.asBitmap(), "jpg", file);
                        } catch (IOException ex) {
                            Logger.getLogger(Scanner.class.getName()).log(Level.SEVERE, null, ex);
                        }