Introduction
I was recently working on a PDF file with 60 odd pages and I had to crop the lower border of the pages.
ImageMagick
ImageMagick is GNU image editing program in Linux. Recently a package named magick has been created by rOpenSci.
Steps of batch manipulation of PDF pages
Loading PDF pages
The PDF pages are loaded as vector of image object
pdf <- image_read("path_file.pdf")
We can access page i with
pdf[i]
Clipping each page as batch
We run the following command to crop each page from below
pdf <- image_chop(pdf, geometry = "See documentation for the notation")
Save as the new file
image_write(pdf, "path")
Details of the magick package and resources
The documentation for magick is available here, here
The documentation for ImageMagick is available here.
Comments are welcome.