📝 README: Describe what this does and why

README.md

@@ -3,8 +3,22 @@ My OCR-D workflow
 
 [![Build Status](https://travis-ci.org/mikegerber/my_ocrd_workflow.svg?branch=master)](https://travis-ci.org/mikegerber/my_ocrd_workflow)
 
-WIP.
+WIP. Given a OCR-D workspace with document images in the OCR-D-IMG file group,
+this workflow produces:
 
+* Binarized images
+* Line segmentation
+* OCR text (using Calamari and Tesseract, both with GT4HistOCR models)
+* (Given ground truth in OCR-D-GT-PAGE, also an OCR text evaluation report)
+
+If you're interested in the exact processors, versions and parameters, please take a look at the [script](my_ocrd_workflow) and possibly the [Dockerfile](Dockerfile) and the [requirements](requirements.txt).
+
+Goal
+----
+Provide an environment to produce OCR output using OCR-D, especially [ocrd_calamari](https://github.com/OCR-D/ocrd_calamari) and [sbb_textline_detection](https://github.com/qurator-spk/sbb_textline_detection), including all dependencies in Docker.
+
+How to use
+----------
 It's easiest to use it as a container. To build the container using Docker:
 ~~~
 cd ~/devel/my_ocrd_workflow
@@ -23,6 +37,7 @@ cd actevedef_718448162.first-page
 ~/devel/my_ocrd_workflow/run
 ~~~
 
+### Viewing results
 You may then examine the results using
 [PRImA's PAGE Viewer](https://www.primaresearch.org/tools/PAGEViewer):
 ~~~
@@ -31,7 +46,7 @@ java -jar /path/to/JPageViewer.jar --resolve-dir . OCR-D-OCR-CALAMARI/OCR-D-OCR-
 
 The workflow also produces OCR evaluation reports using
 [dinglehopper](https://github.com/qurator-spk/dinglehopper), if ground truth was
-available in a OCR-D-GT-PAGE file group:
+available:
 ~~~
 firefox OCR-D-OCR-CALAMARI-EVAL/OCR-D-OCR-CALAMARI-EVAL_00000024.html
 ~~~