I am currently working in extracting text from pdf. my current issue is in distinguishing the headings and sub-headings from the extracted text. I am working with iTextSharp and using the bold text information to detect the heading. The font size cannot be trusted all the time. also tried with PDFBox.
1)I would like to know is there any method to identify headings and sub-headings from PDF.
2)Is adobe or pdfExchange editor provide any API for the same?
For example:
I need to extract
"Tourism in 2040:
Bringing an additional one million visitors
per year to paradise" as heading
"Executive Summary" as sub-heading
Even though this can be extracted using bold text info, it failed in a lot of cases. That's why looking for APIs.
Related
I have developed multiple reports with great success; however, I would now like to add a unique Title to the Description in the Metadata for each exported .png file. In my review of the file Properties, for each image exported, there appears to be no Description information such as Title, Subject, Ratings, Tags or Comments. I would only require Title in the Description portion of the Metadata (this is not the file name).
Additionally, I would like to automate the generation of unique Titles based attributes in the various layers. These unique Titles would be exported as the Title for each unique png exported. I am familiar with the automation syntax; however, I am not familiar with adding the text (e.g. newly automated Title) into the Title of the Description. My intent is to extract the Title of each png so it can be used as the Alt Text when imported in a PDF or MSWord. When generating reports in QGIS I often have hundreds of individual png files exported so any automation would greatly improve this process. For those not familiar with Alt text, it is used to describe the image for visually impaired individuals when using a text reader.
I have searched on numerous keyword related to Alt Text, metadata, etc. for various leads to a solution but have had no success. I am thinking that this is way above my abilities at this point since the metadata labeling and export process appears to be blackhole.
We parse a good number of PDFs, from many vendors. The PDFs are similar, but not exactly the same and things are not always in an exact same position on the same page. Some cases we are able to parse via getting the Strings from the PDF and checkboxes are Unicode. However, many vendors are not using Unicode so an image. These are never forms. So if I use iText to OCR the whole document, what does it produce for these checkboxes? Such that I can look for that and see if a checkbox is checked or not? Or am I just out of luck and the only way the data gets into our application is through manual entry? Thanks.
Using Adobe Acrobat, if you choose Add or Edit Fields... from the Forms menu on a file with no fields, you get a pop-up with a message
Currently, there are no form fields in this PDF. Do you want Acrobat
to detect form fields for you?
Is there a way of accomplishing this sort of of field detection using iText?
Not out of the box but the API exists that you could build your own.
Adobe Acrobat is a PDF renderer and as such it can actually "look" at a PDF as a human does. It "sees" a line with text "near" it and can say with a fair amount of certainty that the line represents a field and the text represents the field's label. Same with circles and squares for radio buttons and check boxes. This document actually describes all of the shapes that Adobe Acrobat searches for.
Adobe's technology, however, assumes that a human will confirm and fix any problems that occur, usually using Adobe's technology:
After running the auto field detection process on a form, check it to make sure the correct fields have been created.
So even if iText supported this, you'd still have to open the PDF in Adobe Acrobat to check and fix things anyway.
But if you want to build your own you could use something like this or this to get at the lines. And this to get at the text.
Is there any clear and proper process to convert a pdf file into a word file with all formatting and images in asp.net web application?
The best way to do that is by using the OCR. It will recognize the text and the images in the PDF file, and then you can save it on a DOC file. I know a third party toolkit named leadtools that should help you doing your requirements, since it support the ASP.NET environment. You can check their Online OCR Demo
Also, you can check their website for more information, or contact their support team.
PDF is a presentational format where all the content is placed by absolute positions. There are no paragraphs and other structured elements (unless it is a Tagged PDF). Technically, you can output every word character by character in any order, but visually it would look like a normal text. Thus, to make a proper conversion to word it is required to do content recognition or some kind of OCR (e.g. ABBYY FineReader)
There are some paid components on the market that allow to do text extraction and some do converting pages to images (obviously, this is not a desired approach for converting into word).
I have a three page Word document that needs to be converted into PDF. This Word document was given to me as a template to show me what the PDF output should look like. I tried converting this document into PDF, created a PDF form and used iTextSharp to open the form, populate it with data and return it back to the client. This is all great but due to large amounts of data stored, the placeholders were insufficient and the text would be truncated or hidden.
My second attempt was to create an MVC 2 View without master page, pass the model to the view, take the HTML representation of the View, pass it over to iTextSharp and render the PDF. The problem here was that iTextSharp failed on some tags (one of them was <hr> tag). I managed to get rid of the problematic tag, but then tables were not rendered properly. Namely, the border attribute was ignored so I ended up with borderless tables. That attempt failed.
I need a suggestion or advice on the most efficient way to create a PDF document in MVC 2 which would be maintainable in the long run. I really don't want my actions to be 200+ lines long. Working directly with the Word document is not the best solution as I have never worked with VSTO so I don't quite know what it would look like to open Word and manipulate text inside of it and add dynamic data and then convert that dynamically into PDF.
Any suggestion is highly welcome.
Best regards!
One thing that I've done in the past is to save the Word file as a DOCX and unzip it since DOCX is just a renamed zip file. Within the archive open up /word/document.xml and you'll see your document. There's a lot of weird XML tags in there but overall you should get a pretty good idea of where your content is. Then just add placeholder text like {FIRST_NAME}, save the file and re-zip.
Then from code you can just perform the same steps, unzipping with something like SharpZipLib or DotNetZip, swapping placeholder copy, re-zipping and then using very simple Word automation to Save-As a PDF.
The other route is to fully utilize iTextSharp and actually write Paragraphs and PdfPTable and everything else. It takes a lot longer to setup but would give you the most control.
Q: you say "... but due to large amounts of data stored, the placeholders were insufficient and the text would be truncated or hidden"
How do you end up having to much data ? If the word template can "hold" the data in 3 pages, they should fit in 3 PDF pages.
I used to use iTextSharp to create my PDF's, but I also almost always ended up building the PDF document from scratch myself.(not really a <200 line solution) Have you considerate another library, I recently switched to MigraDoc's PDFSharp.Way simpler to use then iText, lotsa examples / docus
Just my two cents
Word documents object model is quite easy to understand. It will either contain series of Paragraphs or Tables. Using the Open XML SDK, you can iterate through each paragraph/table in the word document and retrieve it's content and styles. Then you can generate PDF document on the fly using those retrieved information. This will work under MVC too.
But if your word document contains complex elements, then it will take some more time for you to implement based on this approach. Also, this approach would only work with (Word 2007 and 2010) files.
Also, HTML to PDF options currently available in the ITextSharp library would work with only known set of tags, as far as I know.
Another suggestion is to make use of commercially available .NET components. There are lot of good solution available. For ex: Syncfusion