Merge pull request #20244 from lujun9972/add-MjAyMDA3MTEgc2NhbmltYWdlLSBzY2FuIGZyb20gdGhlIGNvbW1hbmQgbGluZS5tZAo=

选题[tech]: 20200711 scanimage: scan from the command line!

sources/tech/20200711 scanimage- scan from the command line.md

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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (scanimage: scan from the command line!)
+[#]: via: (https://jvns.ca/blog/2020/07/11/scanimage--scan-from-the-command-line/)
+[#]: author: (Julia Evans https://jvns.ca/)
+
+scanimage: scan from the command line!
+======
+
+Here’s another quick post about a command line tool I was delighted by.
+
+Last night, I needed to scan some documents for some bureaucratic reasons. I’d never used a scanner on Linux before and I was worried it would take hours to figure out. I started by using `gscan2pdf` and had trouble figuring out the user interface – I wanted to scan both sides of the page at the same time (which I knew our scanner supported) but couldn’t get it to work.
+
+### enter scanimage!
+
+`scanimage` is a command line tool, in the `sane-utils` Debian package. I think all Linux scanning tools use the `sane` libraries (“scanner access now easy”) so my guess is that it has similar abilities to any other scanning software. I didn’t need OCR in this case so we’re not going to talk about OCR.
+
+### get your scanner’s name with `scanimage -L`
+
+`scanimage -L` lists all scanning devices you have.
+
+At first I couldn’t get this to work and I was a bit frustrated but it turned out that I’d connected the scanner to my computer, but not plugged it into the wall. Oops.
+
+Once everything was plugged in it worked right away. Apparently our scanner is called `fujitsu:ScanSnap S1500:2314`. Hooray!
+
+### list options for your scanner with `--help`
+
+Apparently each scanner has different options (makes sense!) so I ran this command to get the options for my scanner:
+
+```
+scanimage --help -d 'fujitsu:ScanSnap S1500:2314'
+```
+
+I found out that my scanner supported a `--source` option (which I could use to enable duplex scanning) and a `--resolution` option (which I changed to 150 to decrease the file sizes and make scanning faster).
+
+### scanimage doesn’t output PDFs (but you can write a tiny script)
+
+The only downside was – I wanted a PDF of my scanned document, and scanimage doesn’t seem to support PDF output.
+
+So I wrote this 5-line shell script to scan a bunch of PNGs into a temp directory and convert the resulting PNGs to a PDF.
+
+```
+#!/bin/bash
+set -e
+
+DIR=`mktemp -d`
+CUR=$PWD
+cd $DIR
+scanimage -b --format png  -d 'fujitsu:ScanSnap S1500:2314' --source 'ADF Front' --resolution 150
+convert *.png $CUR/$1
+```
+
+I ran the script like this. `scan-single-sided output-file-to-save.pdf`
+
+You’ll probably need a different `-d` and `--source` for your scanner.
+
+### it was so easy!
+
+I always expect using printers/scanners on Linux to be a nightmare and I was really surprised how `scanimage` Just Worked – I could just run my script with `scan-single-sided receipts.pdf` and it would scan a document and save it to `receipts.pdf`!.
+--------------------------------------------------------------------------------
+
+via: https://jvns.ca/blog/2020/07/11/scanimage--scan-from-the-command-line/
+
+作者：[Julia Evans][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://jvns.ca/
+[b]: https://github.com/lujun9972