private void saveJpeg(string path, Bitmap image, long quality)
{
EncoderParameter qualityParam = new EncoderParameter(Encoder.Quality, quality);
ImageCodecInfo jpegCodec = getEncoderInfo("image/jpeg");
if (jpegCodec == null)
return;
EncoderParameters encoderParams = new EncoderParameters(1);
encoderParams.Param[0] = qualityParam;
image.Save(path, jpegCodec, encoderParams);
}