I have a task where I have to extract text which are behind images and have been OCR-ed from the image itself. This text is transparent. The problem is there is an image which has text behind it which is not OCR-ed, it is just normal text and it is not transparent. How can I differentiate between the needed (transparent)
Tag: pdfbox
Message digest in a base64 encoded signed attributes DER structure
I have the following ASN1 ASN.1 dump and I understand that the OCTET STRING is the messageDigest(hash sha-256) of what I am trying to sign. Which in this case is a PDF document using PDFBOX the code I’m using to sign is the following I have also calculated the sha-256 of the document I am trying to sign and the
Upload a file to an SFTP server using PDFBox save method without storing the file to the local system?
I’m trying to save the edited PDF which I fetched from the remote server back to its location without having it downloaded/stored on the local machine. I’m using JSch SFTP method to get the input PDF file from the SFTP server using and after doing some edits using PDFbox, I’m trying to save it using: I am not able to
COSStream has been closed and cannot be read
I have next code in my project and time to time it falls with COSStream has been closed and cannot be read. Perhaps its enclosing PDDocument has been closed? It happens in different time and with different workload, so I want to fix it. Thanks in advance. and here part that load resourse: Answer You use streams from template documents
PDF stuck in “printing” state using Java PDFBox 2.0.21
I am trying to setup a printer class in Java that can print PDF files using PDFBox. My printPdf method successfully adds the .pdf file in the printer’s queue but it does not print at all (it gets stuck in the “printing…” state). It only happens to some specific PDF files. For some pdf files it will work perfectly, for
Why i get the warning message “Removed /IDTree from /Names dictionary, doesn’t belong there”?
My code is working, but im getting this warning message on the console: “Removed /IDTree from /Names dictionary, doesn’t belong there” I’ve just searched about it, but i didn’t find anything. Does someone know what can be causing this warning message? My code: Answer tl;dr: don’t bother. The message indicates that there is an /IDTree (which is a part of
catch PDFBox warnings when loading erroneous PDFs
when loading a PDF with PDFBox one gets log-level warnings if the PDF is erroneous: For example, this could lead to the following output on the console: Obviously, the pdf has some errors in the content stream, but it does load into doc. But would it be possible to catch this warnings programmatically with PDFBox? Do some properties exist which
Extract Checkbox value out of PDF 1.7 using PDFBox
I have recently started working with pdfbox to extract text out of pdf. Though along with text I also need to extract checkbox value show in image. I have tried different methods to find the checkbox element and extract its values. After researching the pdf text through this tool I found that the checkbox is not image or anything but
How to disable PDFBox warn logging
I have a simple java console application. pdfbox is utilized to extract text from PDF files. But there is continuous info printed in console: I really want to remove this information from the console. And I use logback for logging, the logback.xml is just like: I have find some answer say that should change the Level. I have changed the
Radiobutton display problems with PDFBox
I used the code from the answer from this question to create my radiobuttons: How to Create a Radio Button Group with PDFBox 2.0 After I created my PDF and tried to read the (programatically) selected value from it, this code worked fine: When I open the PDF in Acrobat Reader DC, make changes and save it again the code