How to set Image Quality value when converting a PDF to JPG?

ConvertPagesToImages convert = new ConvertPagesToImages("inputFile.pdf");
final JpegEncoderOptions options = new JpegEncoderOptions();
options.setQuality(90);//0-100
if (convert.openPDFFile()) {
    for (int page = 1; page <= convert.getPageCount(); page++) {
        BufferedImage bi = convert.getPageAsImage(page);
        //write out
        JDeli.write(bi, options, new File("outputFile" + page + ".jpg")); 
    }
}