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[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: 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

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[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: 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：从命令行扫描!
======
这又是一篇关于我很喜欢的一个命令行工具的文章。
昨晚，出于官僚原因，我需要扫描一些文档。我以前从来没有在 Linux 上使用过扫描仪，我担心会花上好几个小时才弄明白。我从使用 `gscan2pdf` 开始，但在用户界面上遇到了麻烦。我想同时扫描两面（我知道我们的扫描仪支持），但无法使它工作。
### 遇到 scanimage！
`scanimage` 是一个命令行工具，在 `sane-utils` Debian 软件包中。我想所有的 Linux 扫描工具都使用 `sane` （”scanner access now easy“） 库，所以我猜测它和其他扫描软件有类似的能力。在这里，我不需要 OCR，所以我们不打算谈论 OCR。
### 用 `scanimage -L` 得到你的扫描仪的名字
`scanimage -L` 列出了你所有的扫描设备。
一开始我不能让它工作，我有点沮丧，但事实证明，我把扫描仪连接到了我的电脑上，但没有插上电源。
插上后，它马上就能工作了。显然我们的扫描仪叫 `fujitsu:ScanSnap S1500:2314`。万岁！
### 用 `--help` 列出你的扫描仪选项
显然每个扫描仪有不同的选项（有道理！），所以我运行这个命令来获取我的扫描仪的选项：
```
scanimage --help -d 'fujitsu:ScanSnap S1500:2314'
```
我发现我的扫描仪支持 `--source` 选项（我可以用它来启用双面扫描）和 `--resolution` 选项（我把它改为 150，以减少文件大小，使扫描更快）。
### scanimage 不支持输出 PDF 文件（但你可以写一个小脚本）
唯一的缺点是：我想要一个 PDF 格式的扫描文件，而 scanimage 似乎不支持 PDF 输出。
所以我写了这个 5 行的 shell 脚本在一个临时文件夹中扫描一堆 PNG 文件，并将结果保存到 PDF 中。
```
#!/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
```
我像这样运行脚本：`scan-single-sided output-file-to-save.pdf`
你可能需要为你的扫描仪设置不同的 `-d` 和 `-source`。
### 这真是太简单了!
我一直以为在 Linux 上使用打印机/扫描仪是一个噩梦，我真的很惊讶 `scanimage` 可以工作。我可以直接运行我的脚本 `scan-single-sided receipts.pdf`，它将扫描文档并将其保存到 `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：[geekpi](https://github.com/geekpi)
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