如何在滚动窗格内正确裁剪？

Question

我一直收到裁剪图像的异常偏移量或java.awt.image.RasterFormatException：（y + height）在Raster异常之外。知道我在做什么错吗？

我正在使用缩放参数：parameterX和parameterY，因为我以前缩小过imageView，但是没有使用这些事件，我没有收到矩形所选择的裁剪区域

private void CropImage() {
    BufferedImage src;
    try {
        src = ImageIO.read(imageSourceFile);

        double parameterX = image.getWidth() / imageView.getFitWidth();
        double parameterY = image.getHeight() / imageView.getFitHeight();

        int positionX = (int) ((image.getWidth() * scrollPane.getHvalue() / parameterX) + croppingRectangle.getX());
        int positionY = (int) ((image.getHeight() * scrollPane.getVvalue() / parameterY) + croppingRectangle.getY());
        int desiredWidth = (int) (parameterX * croppingRectangle.getWidth());
        int desiredHeight = (int) (parameterY * croppingRectangle.getHeight());

        BufferedImage destBuffered = src.getSubimage(positionX, positionY, desiredWidth, desiredHeight);

        File outputfile = new File("C:/Users/admin/Desktop/cropped.jpg");
        ImageIO.write(destBuffered, "jpg", outputfile);

        System.out.println("Image cropped successfully: " + outputfile.getPath());

    } catch (IOException ex) {
        System.out.println("couldnt load img");
    }

}