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76 lines
3.3 KiB
Markdown
76 lines
3.3 KiB
Markdown
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[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (scanimage: scan from the command line!)
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[#]: via: (https://jvns.ca/blog/2020/07/11/scanimage--scan-from-the-command-line/)
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[#]: author: (Julia Evans https://jvns.ca/)
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scanimage: scan from the command line!
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======
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Here’s another quick post about a command line tool I was delighted by.
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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.
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### enter scanimage!
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`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.
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### get your scanner’s name with `scanimage -L`
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`scanimage -L` lists all scanning devices you have.
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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.
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Once everything was plugged in it worked right away. Apparently our scanner is called `fujitsu:ScanSnap S1500:2314`. Hooray!
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### list options for your scanner with `--help`
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Apparently each scanner has different options (makes sense!) so I ran this command to get the options for my scanner:
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```
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scanimage --help -d 'fujitsu:ScanSnap S1500:2314'
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```
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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).
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### scanimage doesn’t output PDFs (but you can write a tiny script)
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The only downside was – I wanted a PDF of my scanned document, and scanimage doesn’t seem to support PDF output.
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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.
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```
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#!/bin/bash
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set -e
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DIR=`mktemp -d`
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CUR=$PWD
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cd $DIR
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scanimage -b --format png -d 'fujitsu:ScanSnap S1500:2314' --source 'ADF Front' --resolution 150
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convert *.png $CUR/$1
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```
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I ran the script like this. `scan-single-sided output-file-to-save.pdf`
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You’ll probably need a different `-d` and `--source` for your scanner.
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### it was so easy!
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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`!.
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--------------------------------------------------------------------------------
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via: https://jvns.ca/blog/2020/07/11/scanimage--scan-from-the-command-line/
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作者：[Julia Evans][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://jvns.ca/
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[b]: https://github.com/lujun9972
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