//картинка в байты
    public byte[] extractBytes(String ImageName) throws IOException {
        // open image
        File imgPath = new File(ImageName);
        BufferedImage bufferedImage = ImageIO.read(imgPath);

        // get DataBufferBytes from Raster
        WritableRaster raster = bufferedImage.getRaster();
        DataBufferByte data = (DataBufferByte) raster.getDataBuffer();
        return (data.getData());
    }