URG Viewer: Complete Guide to Features and Setup

URG Viewer Tips & Tricks: Faster Inspection of Scan Data

Efficiently inspecting LiDAR scans with URG Viewer saves time and helps you spot issues quickly. Below are focused tips and practical tricks to speed up your workflow and improve data interpretation.

1. Calibrate display for immediate clarity

• Set correct units: Switch to meters or centimeters to match your project.
• Adjust scan range: Limit displayed range to the region of interest to reduce clutter.
• Scale points: Increase point size slightly to make sparse scans readable without hiding detail.

2. Use filtering to remove noise

• Range filter: Exclude readings outside expected distances (e.g., >10 m) to suppress spurious returns.
• Intensity threshold: If available, filter low-intensity returns that are likely noise.
• Median smoothing: Apply a short temporal median filter to remove isolated spikes while preserving edges.

3. Leverage ROI and zoom tools

• Draw a region of interest (ROI): Focus processing and rendering on critical areas (doors, obstacles).
• Zoom shortcuts: Memorize zoom and pan shortcuts to jump between overview and detail views quickly.

4. Speed up with decimation and subsampling

• Angular decimation: Display every Nth beam when inspecting large sweeps to reduce rendering load.
• Temporal subsampling: Show fewer frames per second during live scans to keep the UI responsive.

5. Use overlays for context

• Grid and axes: Enable a grid to judge distances and alignments at a glance.
• Trajectory/path overlay: If URG Viewer supports it, overlay robot odometry or path to correlate scans with motion.
• Color by range or intensity: Use color mapping to highlight depth variations and reflective objects.

6. Automate repetitive inspections

• Saved views: Save camera positions and zoom levels for quick recall of common inspection angles.
• Batch playback: Use recorded sessions to replay and scan multiple files sequentially instead of loading manually.

7. Quick diagnostics for common issues

• Missing sectors: Check sensor rotation settings and verify no physical blockage.
• Repeated spikes: Look for reflective surfaces or direct sunlight; apply intensity/range filters.
• Drift or misalignment: Confirm sensor mounting and compare successive frames for consistent offsets.

8. Combine with lightweight tools

• Export snapshots: Take quick exports of problematic frames for sharing or offline analysis.
• Use small scripts: Convert logs to simple CSV for batch filtering or plotting when URG Viewer lacks a feature.

9. Performance tuning

• Limit history buffer: Reduce number of frames kept in memory.
• Hardware acceleration: Enable GPU rendering if available to smooth large scans.
• Close unused panels: Simplify the UI to free resources.

10. Best practices workflow

1. Configure units and range.
2. Apply decimation for overview.
3. Use ROI to inspect details.
4. Toggle color-by-intensity for material clues.
5. Save view and export snapshots for documentation.

Use these tips to make URG Viewer faster and more effective for routine LiDAR scan inspection.