处理pdf

#http://0x2a.at/blog/2011/02/pdf_manipulation_on_the_cli/

#https://stackoverflow.com/questions/535794/how-can-i-combine-two-pdf-pages-show-up-on-the-same-page

pdfjam figure9aCCN4M.pdf figure9b.pdf --nup 2x1 --landscape --outfile figure9.pdf

The same can be achieved with the ImageMagick package:

montage *.pdf merged.pdf

尝试处理掉中间的空白：

可以先 pdfjam --trim '1cm 2cm 1cm 2cm' --clip true figure9b.pdf --outfile output92.pdf

https://tex.stackexchange.com/questions/446103/pdfpages-pdfjam-with-different-template-size

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https://tex.stackexchange.com/questions/79623/quickly-extracting-individual-pages-from-a-document

pdfjoin --paper a4paper --rotateoversize false

其他工具：

https://blog.seisman.info/merge-pdf/

https://superuser.com/questions/917190/merge-two-pdf-files-side-by-side-in-command-line

#Manipulating pdfs with pdfjam()

https://texblog.org/2015/10/07/combining-sub-figures-to-a-single-figure-for-submission-to-journal/

Other options to pdfnup include --pages, --paper, --orient, --trim裁剪, --delta间隔, --offset, --scale and --openright.

We can also use pdfnup simply to select pages from a PDF file:

  pdfnup file1.pdf --nup 1x1 --pages 1,3,5-6 \

    --outfile file1-selection.pdf

https://helpmanual.io/help/pdfjam/

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Latex中PDF裁剪工具pdfcrop的使用

pdfcrop input.pdf output.pdf 

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pdfjam figure10a.pdf figure10b.pdf figure10c.pdf figure10d.pdf --nup 2x2 --trim '0.1cm 2cm 0.1cm 2cm' --clip true --delta "0.001cm 0.001cm" --outfile figure104.pdf

pdfcrop input.pdf output.pdf 

自己提的问题还未解决

pdfjam: Merging multiple pdfs into one page without white space like this Merge two PDF pages into new one without blank spaces between text content

具体示例https://indico.cern.ch/event/489565/contributions/1999816/attachments/1217344/1778174/pdfjam.pdf