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--- dev:desktop:preferences:roadmark_detection [2021/04/16 10:44]
paulien created
+++ dev:desktop:preferences:roadmark_detection [2023/05/30 14:53]
karen removed
@@ Line 2: / Line 2: @@
 This page describes only the parameters and preferences of Roadmark Detector. \\
-Full documentation about semi-automatic detectors, see [[dev:technology:3d_mapping:measurements|]].\\
+Full documentation about semi-automatic detectors, see [[dev:technology:3d_mapping:measurements|]].
-General concepts of Detectors Preferences, see [[dev:desktop:preferences:detectors|]].
+{{orbitgis:how_to_find.png?25&nolink|}} Main Toolbar > Preferences > Detectors > Roadmark Detector
+===== Concepts =====
-===== Algorithm =====
-In process of detecting a cable is modeled as sequence of line segments which should meet certain criteria.\\
-=== Search Margin ===
-=== Mark Width Max ===
-=== Mark Width Min ===
-=== Segment Sections Length ===
-=== Segm Section Ground Margin ===
+===== Algorithm =====
+==== Search Margin ====
-=== Segment Section Side Step ===
+The horizontal margin to search for the next segment.
+==== Mark Width Max ====
+The maximum width of a mark.
-=== Reflectivity Treshold ===
+==== Mark Width Min ====
+The minimum width of a mark.
+==== Segment Sections Length ====
-=== Dashed Lines ===
+A segment of the road MARK(?)is detected by detecting multiple adjacent small sections.
-== High Reflective Pts Percentage ==
+==== Segm Section Ground Margin ====
+Ground margin for segments sections of line.
-== Consecutive Segs Null Max
+==== Segment Section Side Step ====
+The position of a small section is projected from the previous, then moved sideways by this side step.
-== PC Pixel Size ==
+==== Reflectivity Threshold ====
+The reflectivity threshold to get a new segment is a percentage of the average intensity of last segment points.
+==== Dashed Lines ====
+=== High Reflective Pts Percentage ===
-=== Solid Lines: Gap Distance Max ===
+Use this percentage of higher reflectivities to calculate next reflectivity threshold. eg. next threshold is the average intensity of 10% higher intense point multiplied by intensity threshold parameter.
+=== Consecutive Segs Null Max ===
+Maximum number of consecutive null segments.
+=== PC Pixel Size ===
-===== Output =====
+Increase pixel size to reduce number of point cloud points used.
-=== Feature Lengt Max ===
+==== Solid Lines: Gap Distance Max ====
+The length of the maximum gap on a solid road mark.
-=== Final line Distance Points ===
+====== Output ======
+==== Feature Lengt Max ====
+The maximum length for a feature. Detection continues as far as possible if this value is zero.
-=== Dashed Lines: Resturn Dashed Line Segments ===
+==== Final line Distance Points ====
+Distance between the points on the final line
+==== Dashed Lines: Resturn Dashed Line Segments ====
-=== Search Margin ===
+Should a dashed line be segmented into its units?