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How to read marked fields(checkboxes/radiobuttons) from paper survey


I’ve automatically (via .Net code) generated a PDF(let’s call it “Master template”) which is then printed out on paper and filled by users. The response are scanned and uploaded back into the system as PDF/image.

The PDF contains textbox, radio buttons, and checkboxes.

Is it possible that we can identify which all radioboxes/checkboxes are filled/marked by the user on paper (by comparing the scanned images/PDF with master template)?
I can’t locate fields on “Master template” manually as I’m generating lot of such PDF documents.

You can find the auto-generated PDF attached.PDF Survey.pdf (164.6 KB)



Thank you for contacting Aspose Support.

We are working on your query and will get back to you soon.


Thanks @muhammadahmad.

Is there any new developments on this or do you need any additional information?

It is of high priority for us.



We regret to share that the required feature is not present in the API at the moment. However, we have logged an investigation ticket as OCR-511 in our issue tracking system to investigate the feasibility of this feature. We will update you here as soon as additional information is available regarding this.