Velocity Analysis
Feature Description
The velocity analysis feature is used to monitor the moving speed of targets in real-time, detecting issues such as speeding, parking, and road congestion. Using velocity analysis will automatically perform object detection and target tracking.
Feature Entry
- Video Analysis tab -> Transport Analysis group -> Measure Speed Analysis button.
- Video Analysis tab -> Transport Analysis group -> Velocity Analysis drop-down button -> Velocity Analysis.
Steps
- Video Analysis tab -> Transport Analysis group -> Velocity Analysis drop-down button -> Speed Display Style button; In the pop-up dialog, configure detection types and speed text styles including font type and size.
- Click the Velocity Analysis feature to open the velocity analysis panel;
- Set the following parameters in the velocity analysis group:
- Existence Time (seconds): Set the minimum duration for target presence. Targets will only be detected when their existence time meets or exceeds this value.
- Maximum Speed: Set the upper speed limit for object detection. Targets exceeding this speed will be considered as speeding and excluded from detection (unit: km/h).
- Minimum Speed: Set the lower speed threshold. Targets below this speed will not be displayed in the video window (unit: km/h).
- Display Speed: Check this box to show current speed above vehicles.
- Output Speeding Records: Check to record speeding vehicle information in the Output Window, including vehicle ID, appearance time, actual video capture time, and speed.
- Speeding Snapshot: Check and select a storage path. The system will capture images of speeding vehicles (in .png format) based on the maximum speed setting.
- Parking: Check to identify stationary vehicles (speed=0) and display parking alerts above them.
- Congestion: Check to detect road congestion, displayed at the upper-left corner of the video.
- Road Type: When enabled, select from: urban arterial roads, secondary roads, and highways/urban expressways.
- Congestion Road: Click Congestion Road to configure analysis objects for congestion output.
- Analyze Region: Select the data source containing region datasets;
- Road Alias: Custom alias for road display in congestion alerts;
- Road Surface: Click ... to open SQL Expression dialog and select corresponding road surface objects;
- Intersection Area Ratio: Ratio between vehicle bounding box and lane intersection area. Vehicles are assigned to lanes when ratio exceeds specified threshold.
Notes:- Disabling auto skip frames is recommended to ensure detection accuracy.
Related Topics