All Questions
Tagged with image-processing pdf
7
questions
0
votes
1
answer
41
views
File Size increases on basic pdf -> raster image -> pdf roundtrip with `pdfimages` + `magick`
Why do I not succeed into making this simple pdf → raster image → pdf round-trip file-size-stable?
$ # Get original file (8KB, just extracted from my scanner).
$ curl "https://nextcloud.mbb.cnrs....
- 366
0
votes
2
answers
123
views
PDF Composed of Images of Text - How to Convert to text file?
I have a PDF composed of many scanned pages. An example snippet of the text is shown below (do not worry about privacy, as this is a publicly available document). As you can see, it is very difficult ...
- 101
1
vote
0
answers
28
views
Remove watermark from pdf of images [duplicate]
I have a pdf consiting of page scans and they have they have an annoying watermark that appears as a grey image in the middle of pages difficulting reading. Since the pdf is made of image files there ...
- 119
0
votes
0
answers
58
views
How to pre-process the background of this image in order to OCR the table properly?
I have to OCR the book of tables consisting of 500+ pages but the maker stamped every page. Can anybody help me on how should I process it in order to be able to recognize it let's say in FineReader? ...
- 127
3
votes
1
answer
946
views
When a PDF file only contains a scanned image, is it just a JPG image inside a PDF container?
Many scanners can scan a page into a PDF file.
When this is done, is the PDF file really just a container that contains a single image? Is that image typically a JPG image, a PDF image, or a ...
- 8,477
1
vote
1
answer
341
views
How to extract image rotation from a PDF
I'm extracting all the images from a bunch of scanned PDFs using pdfimages, in order to process and repackage them.
The problem is that some images are rotated 90° (either CW or CCW) and others are ...
- 378
1
vote
1
answer
2k
views
reducing the size of PDF file of scanned images
I downloaded this PDF file from a website which is 350 KB in size with 20 pages. All pages are scanned images. I extracted the images using Adobe Acrobat Pro which are 1.32 MB in size collectively (...
- 1,086