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dev:desktop:preferences:roadmark_detection [2021/04/16 11:20] paulien [Algorithm] |
dev:desktop:preferences:roadmark_detection [2023/04/06 10:22] jeroen [Preferences of Roadmark Detection] |
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| This page describes only the parameters and preferences of Roadmark Detector. \\ | This page describes only the parameters and preferences of Roadmark Detector. \\ | ||
| - | Full documentation about semi-automatic detectors, see [[dev: | + | Full documentation about semi-automatic detectors, see [[dev: |
| - | General concepts of Detectors Preferences, | + | |
| + | {{orbitgis:how_to_find.png? | ||
| + | |||
| + | ===== Concepts ===== | ||
| Line 9: | Line 12: | ||
| ===== Algorithm ===== | ===== Algorithm ===== | ||
| - | In process of detecting a cable is modeled as sequence of line segments which should meet certain criteria.\\ | + | ==== Search Margin |
| - | + | ||
| - | === Search Margin === | + | |
| The horizontal margin to search for the next segment. | The horizontal margin to search for the next segment. | ||
| - | === Mark Width Max === | + | ==== Mark Width Max ==== |
| The maximum width of a mark. | The maximum width of a mark. | ||
| - | === Mark Width Min === | + | ==== Mark Width Min ==== |
| The minimum width of a mark. | The minimum width of a mark. | ||
| - | === Segment Sections Length === | + | ==== Segment Sections Length |
| - | A segment of the road is detected by detecting multiple adjacent small sections. | + | A segment of the road MARK(?)is detected by detecting multiple adjacent small sections. |
| - | === Segm Section Ground Margin === | + | ==== Segm Section Ground Margin |
| Ground margin for segments sections of line. | Ground margin for segments sections of line. | ||
| - | === Segment Section Side Step === | + | ==== Segment Section Side Step ==== |
| The position of a small section is projected from the previous, then moved sideways by this side step. | The position of a small section is projected from the previous, then moved sideways by this side step. | ||
| - | === Reflectivity | + | ==== Reflectivity |
| - | The reflectivity | + | The reflectivity |
| - | === Dashed Lines === | + | ==== Dashed Lines ==== |
| - | == High Reflective Pts Percentage == | + | === High Reflective Pts Percentage |
| - | The reflectivity treshold to get a new segment is a percentage of the average intensity of last segment points. | + | 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 == | + | === Consecutive Segs Null Max === |
| Maximum number of consecutive null segments. | Maximum number of consecutive null segments. | ||
| - | == PC Pixel Size == | + | === PC Pixel Size === |
| Increase pixel size to reduce number of point cloud points used. | Increase pixel size to reduce number of point cloud points used. | ||
| - | === Solid Lines: Gap Distance Max === | + | ==== Solid Lines: Gap Distance Max ==== |
| The length of the maximum gap on a solid road mark. | The length of the maximum gap on a solid road mark. | ||
| - | ===== Output ===== | + | ====== Output ====== |
| - | + | ||
| - | === Feature Lengt Max === | + | |
| - | + | ||
| - | + | ||
| - | + | ||
| - | === Final line Distance Points | + | |
| + | ==== 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? |