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#19 SUSB Expo 2014 Field of View

Date post:11-Jun-2015
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#19 SUSB Expo 2014 Field of View
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  • 1. Smart Vision. Smart Decision. Presenter: Danny Hajicek Software and Electrical Design Engineer How payload technology can optimize UAS-based agricultural aerial imaging operations [email protected] Fieldofviewllc.com

2. Outline ! Why UAS for imaging? ! Camera options ! Post processing hurdles ! Direct georeferencing ! Input data timing and sensor accuracy ! Camera triggering ! Optimization matters / Limited time 3. On demand 5cm resolution Scheduled 1m resolution 6 day revisit 5m resolution 16 day revisit 30m resolution Availability and Resolution 4. High Resolution DSLR or MILC ! Color imagery (RGB) ! High resolution ! Simple to manage ! Red, Green, Blue 5. ! False color imagery (CIR) ! Converted (NIR, Green, Blue) ! Purpose-built (NIR, Red, Green) Multispectral Cameras 6. Image Processing ! Stitch multiple images into single mosaic ! Georeferencing ! Ground control points ! Position (and attitude) metadata ! Mosaic requirements ! Coverage of AOI ! Sufficient image overlap Agisoft PhotoScan Pro 7. Sensor Positioning 8. Positioning Challenges ! Maintain flight line ! Pushed by wind ! Autopilot not tuned ! Incorrect altitude ! Camera fault ! Poor flight planning ! Typically not realized until mosaicking is attempted back at the office 9. Coverage Verification ! Quality control ! 1st visit success => profit ! Must happen quickly and on-site ! Actionable visualization ! Direct georeferencing ! Use position/attitude to calculate image placement ! Can be highly automated ! Sensor accuracy affects results 10. Effects of Sensor Accuracy ! GPS accuracy ! Single frequency GPS 3m ! Dual frequency GPS 1m ! Augmented GPS 0.5m ! IMU accuracy ! Autopilots 1 ! Medium grade IMU 1 ! High grade IMU 0.05 ! Placement accuracy depends on altitude 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 0 500 1000 1500 2000 2500 3000 RSSError(m) Altitude (ft) 11. Effects of Sensor Accuracy ! Autopilot data ! Low sensor accuracy ! Meant for navigation, not direct georeferencing ! No confidence in results ! GPS/IMU accuracy ! Single frequency GPS ! 0.25 pitch/roll ! 0.75 heading 12. Single frequency GPS, 0.25 pitch/roll, 0.75 heading (VectorNav VN-200 GPS/IMU) 13. Association Accuracy " Accurate GPS/IMU " Dedicated attitude/position photo association processor GeoSnap VN-TC on an ADC Lite 14. Camera Interface Options " Hard wired " Infrared " Serial GeoSnap VN-TC on a Mini-MCA GeoSnap VN-SLR on a Canon 6D 15. Intelligent Triggering Achieve required overlap, without capturing extraneous images WindWindWind Traditional Time based Enhanced distance based Efficient distance based with pitch/roll disable 16. Big Picture " Commercial Operations ! Slim margins in Ag ! Successful = optimized 17. Smart Vision. Smart Decision. Presenter: Danny Hajicek Software and Electrical Design Engineer How payload technology can optimize UAS-based agricultural aerial imaging operations [email protected] Fieldofviewllc.com

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