diff --git a/doc/misc/idea_visualizer.adoc b/doc/misc/idea_visualizer.adoc
index b4656cf..96e87f4 100644
--- a/doc/misc/idea_visualizer.adoc
+++ b/doc/misc/idea_visualizer.adoc
@@ -1,11 +1,10 @@
 = The idea of OSI Visualizer
 
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+OSI Visualizer is a visualization tool for OSI messages.
+It provides two independent channels that can use different input sources.
+OSI Visualizer either receives OSI messages via network or reads them from an OSI trace file.
+If OSI Visualizer reads messages from a trace file, it can also publish them to a configured port of `localhost`.
+OSI Visualizer supports `GroundTruth`, `SensorView` and `SensorData` messages.
+
+[[image-osi_visualizer]]
+image::osi_visualizer.png[title = "User interface of OSI Visualizer."]
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diff --git a/doc/osi-visualizer_user_guide.adoc b/doc/osi-visualizer_user_guide.adoc
index 769acc5..1ee4689 100644
--- a/doc/osi-visualizer_user_guide.adoc
+++ b/doc/osi-visualizer_user_guide.adoc
@@ -7,6 +7,7 @@
 
 :topicdir: topics
 :reusedir: reuse
+:imagesdir: _images
 
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