====== Preferences of Traffic Signs Detection =====

This page describes only the parameters and preferences of Automated Traffic Signs Detection. \\
Full documentation about concept, workflow and sidebar, see [[200:desktop_ext:automated_feature_extraction|]].
General concepts of Detectors Preferences, see [[200:desktop:preferences:detectors|]].


=== Basic Parameters ===
{{  :200:desktop:preferences:preferences_traffic_signs_detection_parameters.png|}}
**Sign Points Min**\\
The minimum number of high reflective points per sign.

**Width Min**\\
Minimum for a traffic sign.

**Proximity Distance**\\
Proximity distance to define points to be from the same traffic sign. 


=== Advanced Parameters ===
{{  :200:desktop:preferences:preferences_traffic_signs_detection.png?nolink|}}
== Algoritm ==

** Trajectory section**\\
The size of sections to scan the trajectory with. 

** Adapt Reflectivity checkbox **\\
Use an adaptive reflectivity threshold to detect signs, based on the reflectivity of their surroundings. 

** Reflectivity Min**\\
Minimum reflectivity threshold to detect signs with.

** Reflectivity Null**\\
Minimum reflectivity to assume. Reflectivities below this value are not considered in the detection. 

** Max High Reflectivity Pts Count**\\
Number of points to define the maximal reflectivity in a set of points.

** Cluster Points Min**\\
The minimum amount of points in the cluster to be considered in further processing.

** Horizontal Slice Z size **\\
Z size of a horizontal slice yo analyze the candidate. 

** Thickness Max **\\
The maximum thickness of a traffic Sign. 

**Height Min**\\
Minimal height of a traffic sign. 

**Neighborhood Dist**\\
Maximum XY distance around a candidate to evaluate traffic sign. 

** Tolerance Dist**\\
A maximum inclination traffic sign is allowed to have (calculated from perfectly vertical).

** Detect Sign Shape**\\
Should the shape of the sign be in the detected features? 

**Reposition Step**\\
The repositioning step to identify the shape. 

** Match Percent Min**\\
The minimal match percentage for both feature points inside shape and shape unit cells.\\


== Output ==
** Get selection per feature**\\
Get a selection file of the points that belong to the feature.

**Get selection all features**\\
Get a file with the detected features. 

** Get feature Images**\\
Should get images of the feature? 

**Images Count**\\
The Number of images that should be selected of each detected feature. 

**Print Images**\\
Should images be printed?