How to improve the resolution of the image?

[davinchi7]

Hi!
I have tested the library and it works very well. I would like to know if you can improve the resolution of the image.
Thank you very much.

[indradeepc]

Did you find any solution for this?

[chen0040]

Sorry pretty busy recently with my works, did not have a chance to look at how to resolve this. One way that you may try is to change the Pdf2Image.PrintQuality = 100. If not working, I will look into this issue during weekend.

[davinchi7]

Hello Friend,
Thank you very much for your answer. Is it possible that the lack of quality is due to the type of font used in the PDF? Can I send you my PDF for you to try it on?
Thank you very much

demo.pdf

[chen0040]

@davinchi7 thanks for the demo.pdf, i think you are right about the font. i was tuning the fonts for the pdf convert, still working on it. below are some of the config i was experimenting:

`/*

        cs_pdf_to_image.Pdf2Image.Config.DisablePrecompiledFonts = true;
        cs_pdf_to_image.Pdf2Image.Config.DisablePlatformFonts = true;
        cs_pdf_to_image.Pdf2Image.Config.DisableFontMap = true;*/

        cs_pdf_to_image.Pdf2Image.Config.FontPath.Add(cs_pdf_to_image.Pdf2Image.GetProgramFilePath("arial.ttf"));
        cs_pdf_to_image.Pdf2Image.Config.SubstitutionFont = "arial";

`

The result is still not good. I will do more test and tuning to see if can get this fixed. if you have some suggestion, pls also share :)

[nicksuslov]

In Pdf2Image need set ResolutionX and ResolutionY for PDFConvert. This will increase resolution of the image. I think need to provide additional properties for this in Pdf2Image.

[ghost]

Yes I know my reply is just toooooo late but it works for me like this so I said to my self why mot posting.

In the Pdf2Image file you should find those lines.

converter.FitPage = true;
converter.JPEGQuality = mPrintQuality; //80
converter.OutputFormat = "tifflzw";
// here you add for a rez of 1700x2200
converter.ResolutionX = 200;
converter.ResolutionY = 200;

That it. hope it helps someone.

[GHNJ]

Yes I know my reply is just toooooo late but it works for me like this so I said to my self why mot posting.

In the Pdf2Image file you should find those lines.

converter.FitPage = true;
converter.JPEGQuality = mPrintQuality; //80
converter.OutputFormat = "tifflzw";
// here you add for a rez of 1700x2200
converter.ResolutionX = 200;
converter.ResolutionY = 200;

That it. hope it helps someone.

Where do you see these options?

[Up-Yedou]

According to my experiment, the following codes helps:
// dpi
converter.ResolutionX = 200;
converter.ResolutionY = 200;
// bit depths - 32bits
converter.OutputFormat = "pngalpha";
// poor effect to modify this
converter.TextAlphaBit = 4;
converter.GraphicsAlphaBit = 4;
// correct location of image
converter.FitPage = false;