Create a pdf from a batch of photos, batch convertion jpg to pdf, scan a book with a camera

This technique may be used for special occasion but I do not recommend to do it for scanning an entire book.

The process is simple and usually this can be done quickly with a Smartphone and dedicated apps. However to keep the quality and to gain in speed I decided to scan a book via a mirror reflex (Camera), crop them and reduce the quality of the picture in batch and convert them in 1 pdf.

I would use then for this:

• Irfanview or ImageMagick for rotation if needed
• Irfanview for the croping and resizing
• Gow
• ImageMagick for the convertion in pdf,

Steps:

• Rotation using ImageMagick
  • shell mogrify -rotate "-90" *.jpg
• Crop and resize with Irfanview. It is done in batch, meaning that the position your book in your picture should stay the same throughout the all process.
  • Open Irfanview
  • Open a picture and select what you wanna crop
  • Press B or menu File/Batch Conversion rename …
  • Select Conversion, select your output format (jpg)
  • Use Advanced options and define then: Click on Advanced
    • Select crop (click on “get current selection”)
    • Select resize, set a new size in percentage (up to you, you have to try)
  • Select your files
  • Select your output folder (other folder that input)
  • Start Batch
• Convert in pdf with ImageMagick
  • Open a command prompt in the folder where your crop and resized pictures are
  • Run shell for /F "usebackq delims=" %A in (ls ^|grep -s jpg ^| tr “\n” “ “) do convert -quality 85 %A output.pdf
    • ls ^|grep -s jpg ^| tr "\n" " " will get the file of the jpg and put them in 1 line
    • the rest will convert it, I need to use a loop because windows is not as flexible as linux to pass the output of a cmd as parameter for another one.

Source:

• Info on Gow and other linux tools : [https://tinyapps.org/blog/201606040700_tiny_unix_tools_windows.html]
• [https://askubuntu.com/questions/303849/create-a-single-pdf-from-multiple-text-images-or-pdf-files/887953?newreg=46666755550348dfa59952b528b90745]
• [https://stackoverflow.com/questions/43225925/windows-cmd-pass-output-of-one-command-as-parameter-to-another]