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On-the-go Caliper and Counter Device for Shade and Fruit Tree Nursery Inventory Management
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On-the-go Caliper and Counter Device for Shade and Fruit Tree Nursery Inventory Management

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  • 83 to 87% accuracy
  • Transcript

    • 1. On-the-go Caliper andCounter Device for Shade andFruit Tree Nursery Inventory Management J.S. Owen Jr., W. Shi, S. Singh, H.M. Stoven, K. Lewis
    • 2. Seasonal Counts for Inventory Images by Jim Robbins
    • 3. Automation of InventoryProcesses for Nurseries Dr. James Robbins – Extension Specialist Image by Jim Robbins
    • 4. Caliper as an Estimate of Grade Tallymaster – 2003
    • 5. On-the-Fly Tree CaliperMeasurement 2 Class 3 lasers, 60 Hertz camera
    • 6. On-the-Fly Tree CaliperMeasurement Capture multiple frames per tree at varying angles
    • 7. Caliper 2 Class 3 lasers Caliper estimation at 60 times per second (60 Hz)  Filtered from light Algorithm incorporated to process staked trees Caliper measured at:  distance of 10 to 20” from tree  6” (±2”) above the graft union or soil travelling 3 mph
    • 8. Field Caliper GUI User can specify if stakes are used and diameter of stake Reports optimum measuring distance range and maximum allowed traveling speed to ensure adequate estimates per tree (approx. 12)
    • 9. Unstaked Tree Accuracy +/- 2.5mm
    • 10. Unstaked Tree Accuracy 200 Caliper Ests Manual Utool 180 160Number of trees 140 120 100 80 60 40 20 0 4 5 6 7 More Nursery tree grade
    • 11. Staked Tree Accuracy
    • 12. Staked Tree Accuracy
    • 13. Staked Tree Accuracy Limitation for staked trees  Need to know the caliper of the stake  Caliper of stake and tree must be significantly different (ratio of stake caliper to tree caliper)  Left figure shows stakes deemed acceptable, right figure shows stakes that are not viable.
    • 14. Counter Software Graphic User Interface to include user input, pausing and saving data
    • 15. On-the-Fly Tree Counter J frank Schmidt, OR - 45 Sergeant crabapples travelling < 3 mph. Trees were counted 5 times with an average accuracy of 97% Willow Drive Nursery, WA - 20 apple small caliper seedlings travelling approx 2 mph. Trees were counted 10 times with an average accuracy of 95%. At Dave Wilson Nursery, CA - 50 cherries trees travelling approx 2.5 mph. Each of the tree cultivars were counted 10 to 20 times with an average accuracy of 97% At J frank Schmidt, OR - 45 Gymnocladus seedlings travelling approx 2.5 mph. Each of the tree cultivars were counted 4 times with an average accuracy of 97% At J frank Schmidt, OR on 708 Staked 2 year old red pointe maple (½ - 1 ¼ caliper, 12 inch spacing) 91 to 90% accuracy. Low accuracy was result of a dust film on lens.
    • 16. Localization Post-processed Device: U-blox 6T Cost: $300 to $400 Sub-meter accuracy Field tested ○ Spring (WA) ○ Fall (OR)
    • 17. Localization Tractor track: raw data in red Processed data in green.
    • 18. Localization Tractor’s speed plot: during travel at ~3.0 mph
    • 19. http://www.cascrop.com/