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
258 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
536 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 ...
13
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 ...
8
votes
6answers
17k 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
459 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
12k 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 ...