On-the-fly Tree Counting and Caliper Measure

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Presented by S. Singh, W. Shi and J. Owen at the 2010 ASABE Annual Meeting

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On-the-fly Tree Counting and Caliper Measure

  1. 1. On-the-Fly Tree Caliper Measurement<br />
  2. 2. On-the-Fly Tree Caliper Measurement<br />Some caliper measurement systems<br />Ultrasonic transducer – Upchurch et al.<br />Infrared LEDs to measure tree trunk profile - Singh<br />Laser scanner – Henning, Thies<br />Laser and vision - Byrne<br />Optical sensor, laser and motion measurement Delwiche<br />Our approach<br />Structured laser lines and vision<br />
  3. 3. On-the-Fly Tree Caliper Measurement<br />How does it work?<br />
  4. 4. On-the-Fly Tree Caliper Measurement<br />
  5. 5. On-the-Fly Tree Caliper Measurement<br />Features of our tree caliper measurement device<br />Accurate, reliable measurement<br />Can be used under any lighting condition – such as in the field under sun light or at night or indoor at warehouse <br />No precise position or movement required<br />Can be attached to moving vehicle<br />
  6. 6. On-the-Fly Tree Caliper Measurement<br />Indoor testing at Adams County Nursery warehouse<br />
  7. 7. On-the-Fly Tree Caliper Measurement<br />Indoor testing – caliper estimate error<br />
  8. 8. On-the-Fly Tree Caliper Measurement<br />Outdoor testing at Eisler nursery in Prospect, PA<br />
  9. 9. On-the-Fly Tree Caliper Measurement<br />Outdoor testing – caliper estimate error<br />
  10. 10. On-the-Fly Tree Caliper Measurement<br />Conclusion<br />+/- 2.5mm outdoor, +/- 1mm indoor<br />Operating at any ambient lighting<br />Mounted on moving vehicle<br />Operating simultaneously with other tasks<br />Counting trees while moving along<br />Automatically databasing of tree caliper<br />
  11. 11. On-the-Fly Tree Caliper Measurement<br />Future and on going works<br />Conducting large scale testing in nurseries in Washington, Oregon, California and Pennsylvania<br />Improve accuracy of caliper measurement<br />Increasing sample rate<br />Controlling measuring height<br />Improve algorithm of detecting edges of tree trunk<br />Reducing cost of the device<br />Improve laser safety<br />

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