====== Preferences of Crosswalk Detection =====

This page describes only the parameters and preferences of Crosswalk Detector. \\
Full documentation about semi-automatic detectors, see [[209:technology:3d_mapping:measurements|]].
General concepts of Detectors Preferences, see [[209:desktop:preferences:detectors|]].

**Feature Extraction** and **Feature Extraction Pro**\\
{{orbit_desktop:entrance_icon_2.png?nolink&25 |}}  [[195:desktop:workspace:main_toolbar|Main Toolbar]] > Preferences > Detectors > Crosswalk Detection

{{  :209:desktop:preferences:preferences_detector_crosswalk_v1950.png  |}}
===== Algorithm =====

**Search radius**\\
The algorithm searches for high intensity points in the space of which the width is indicated by this value around the coordinates indicated by the user.

**Ground margin**\\

**Stripe size** and **Space size**\\
Fixed width of the crosswalk stripe and the distance between 2 consequent stripes.

**Step 2D, Step angle and max angle**\\
Starting from the first coordinate indicated by the user, the algorithm searches for the exact length of the crosswalk.
The Step 2D value indicates the length 

**Step angle**\\

**Max angle**\\

**Context radius**\\

{{:209:desktop:preferences:preferences_detector_crosswalk_example_v1950.png?500|}}

===== Output =====

**Return stripes**: enables returning multi-feature consisting of separate polygons for each crosswalk stripe.\\

**Default length**: stripe length used only for visualization during the measurement.