Is the PDF digital signature for a page or for an entire document? Can a page be signed? Although the signature is generally put on a particular page of the file, the whole document is in fact signed. Nevertheless, PDF format supports so-called ‘incremental updating’ strategy that permits to add pages to the file without […]

After transforming a PDF file, I can not copy the text from it anymore. All I get are unreadable characters which make no sense whatsoever. qpdf (by Jay Berkenbilt) to evaluate the file. pdfid.py and pdf-parser. py (by Didier Stevens) to evaluate more. PDFlib’s TET (text extraction tool) to extract and try text. PDFlib’s Font […]

I was looking for the technical requirements of a PDF. I believe text can be kept in 2 methods into a PDF: a) as a text layer above the image layer (as explained in the website above) b) when you develop a PDF from a Word document (with text), I do not believe Word will […]

Installed on local server imagemagick, but do not comprehend ways to convert ALL pages of pdf file into a single image jpg in C#. And whether it is even possible. Without specifying the page number only converts the very first page To make each page of the PDF come out as a separate JPEG, alter […]