可检测到的水印图片.pdf (2.0 MB)
JpegDevice jpegDevice = new JpegDevice(width, height, resolution);
using (FileStream imageStream = new FileStream($"{imgSavePath}{x}.jpeg",
FileMode.Create))
{
jpegDevice.Process(pdf.Pages[x], imageStream);
imageStream.Close();
}
在 jpegDevice.Process(pdf.Pages[x], imageStream); 这一步转图片非常慢