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Update documentation sites

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Eike Kettner
2020-02-20 21:43:37 +01:00
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modules/microsite/docs/doc/install.md
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@ -68,19 +68,28 @@ component.
extraction](https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality)
(at the expense of a longer runtime).
- [Tesseract](https://github.com/tesseract-ocr/tesseract) is the tool
doing the OCR (converts images into text). It is a widely used open
source OCR engine. Tesseract 3 and 4 should work with docspell; you
can adopt the command line in the configuration file, if necessary.
doing the OCR (converts images into text). It can also convert
images into pdf files. It is a widely used open source OCR engine.
Tesseract 3 and 4 should work with docspell; you can adopt the
command line in the configuration file, if necessary.
- [Unoconv](https://github.com/unoconv/unoconv) is used to convert
office documents into PDF files. It uses libreoffice/openoffice.
- [wkhtmltopdf](https://wkhtmltopdf.org/) is used to convert HTML into
PDF files.
The performance of `unoconv` can be improved by starting `unoconv -l`
in a separate process. This runs a libreoffice/openoffice listener
therefore avoids starting one each time `unoconv` is called.
### Example Debian
On Debian this should install all joex requirements:
``` bash
sudo apt-get install ghostscript tesseract-ocr tesseract-ocr-deu tesseract-ocr-eng unpaper
sudo apt-get install ghostscript tesseract-ocr tesseract-ocr-deu tesseract-ocr-eng unpaper unoconv wkhtmltopdf
```
## Database
Both components must have access to a SQL database. Docspell has
@ -203,12 +212,15 @@ work is done by the joex components.
### Joex
Running the joex component on the Raspberry Pi is possible, but will
result in long processing times. Tested on a RPi model 3 (4 cores, 1G
RAM) processing a PDF (scanned with 300dpi) with two pages took
9:52. You can speed it up considerably by uninstalling the `unpaper`
command, because this step takes quite long. This, of course, reduces
the quality of OCR. But without `unpaper` the same sample pdf was then
processed in 1:24, a speedup of 8 minutes.
result in long processing times for OCR. Files that don't require OCR
are no problem.
Tested on a RPi model 3 (4 cores, 1G RAM) processing a PDF (scanned
with 300dpi) with two pages took 9:52. You can speed it up
considerably by uninstalling the `unpaper` command, because this step
takes quite long. This, of course, reduces the quality of OCR. But
without `unpaper` the same sample pdf was then processed in 1:24, a
speedup of 8 minutes.
You should limit the joex pool size to 1 and, depending on your model
and the amount of RAM, set a heap size of at least 500M