Merge Images in Java

Presentation presentation = new Presentation();
try {
    ISlide slide = presentation.getSlides().get_Item(0);

    byte[] firstImageData = Files.readAllBytes(Paths.get("image1.png"));
    IPPImage firstImage = presentation.getImages().addImage(firstImageData);
    slide.getShapes().addPictureFrame(ShapeType.Rectangle, 0, 0, 100, 100, firstImage);

    byte[] secondImageData = Files.readAllBytes(Paths.get("image2.png"));
    IPPImage secondImage = presentation.getImages().addImage(secondImageData);
    slide.getShapes().addPictureFrame(ShapeType.Rectangle, 0, 200, 100, 100, secondImage);

    IImage mergedImage = slide.getImage(1f, 1f);
    try {
        mergedImage.save("merged.png", ImageFormat.Png);
    } finally {
        mergedImage.dispose();
    }
} finally {
    presentation.dispose();
}