1
vote
0answers
17 views

Image size with gscan2pdf and ImageMagick `convert` bloat

I scan all my important incoming physical-mail to PDF. I am trying to move this activity to Linux as part of the process of eliminating my dependence on Windows - where I used to use the excellent but ...
4
votes
2answers
2k views

How to convert a color pdf to black-white?

I'd like to transform a pdf with some coloured text and images in another pdf with only black&white, in order to reduce its dimensions. Moreover, I would like to keep the text as text, without ...
1
vote
1answer
266 views

Imagemagick convert incorrectly sizes landscape pdfs

When I run convert example.pdf example.png I get a png image, but the image in the pdf is off-center and too small. How do I convert so that the png image is the right size and takes the whole ...
3
votes
4answers
2k views

convert single-page landscape pdf into rescaled double-page portrait pdf

I'm having trouble using convert to do the following: I have a bunch of single-page pdf files whose geometry corresponds to a landscape A4 sheet. The actual content is visually split in 2 pages. ...
1
vote
1answer
551 views

Convert a .jpg to a one page .pdf at a certain location

I'm looking to convert a .jpg into a .pdf, where the .jpg is positioned at a certain coordinate say 30 pixels and centered. Right now I'm just using: convert image.jpg image.pdf
4
votes
1answer
1k views

convert pdf to image [jpeg|png]

I need to convert pdf files into image files (like: png (prefer), jpeg). I used convert (from the ImageMagick package) but it takes more than 4 seconds for a 2 page pdf file with only tables ...
15
votes
5answers
11k views

convert images to pdf: How to make PDF Pages same size

I did something like convert -page A4 -compress A4 *.png CH00.pdf But the 1st page is much larger than the subsequent pages. This happens even though the image dimensions are similar. These images ...
10
votes
6answers
18k views

How to convert TXT to PDF?

I want to convert .txt files to .pdf. I'm using this: ls | while read ONELINE; do convert -density 400 "$ONELINE" "$(echo "$ONELINE" | sed 's/.txt/.pdf/g')"; done But this produces one "error" -- ...
2
votes
1answer
465 views

Use convert or ghostscript to grab the odd-numbered pages of a PDF

I have a PDF that consists of several hundred pages of bilingual text. Since I need to use OCR on each language separately, I want to grab the even and odd pages and make two separate PDFs, using ...
3
votes
2answers
4k views

Use convert to grab a specific page from a PDF file?

I know I have done this before, so I'm sure it's possible, I just forget how to do it. There's a way to tell convert to grab a specific page of a PDF, and I'd like to keep the format of that page as ...
8
votes
4answers
13k views

pdf to jpg without quality loss; gscan2pdf

When I convert a pdf file to bunch of jpg files using convert -quality 100 file.pdf page_%04d.jpg I have appreciable quality loss. However if I do the following, there is no (noticeable) quality ...