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I am trying converting a PDF


(please find in attachment,


) to PNG file with 96 dpi and 300 dpi, but the output image is not very clear when comparing to view on Adobe. my code as below:

var dpi = 300;

using (PdfLoadedDocument pdfDocument =new PdfLoadedDocument(inputFile))


Bitmap image=pdfDocument.ExportAsImage(page, dpi, dpi);

image.Save(outputFile, ImageFormat.Png);


  1. with 300 dpi, the gridline is not shape enough as Adobe, and the background is not very clear as Adobe
  2. with 96 dpi, the gridline is very shape and close to the looking on Adobe, but the background is still not very clear.