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Hans Jørgen Andersen

Colour Vision - Weeds the Open Sky and a Thermos. Hans Jørgen Andersen. When then start. Telephone Call from Norway. Reduced use of Pesticides and other Input Factors. Computer Vision for Localization and-or Monitoring of Plants. Outdoor Image Formation. Ambient. Light Sources. Observer.

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Hans Jørgen Andersen

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  1. Colour Vision - Weedsthe Open Skyanda Thermos Hans Jørgen Andersen

  2. When then start Telephone Call from Norway Reduced use of Pesticides and other Input Factors Computer Vision for Localization and-or Monitoring of Plants

  3. Outdoor Image Formation Ambient LightSources Observer Point Uniform Reflectance Object Absorption Transmittance

  4. Dichromatic Reflection Model Type I Neutral Interface Reflection, Objects with high oil, water content Type II ”Full” Dichromatic Reflection Model Objects as silk, wool, coloured paper Type III Special Version of the Dichromatic Reflection Model Adaptable for Metals Reflected Light Body Reflection Surface Reflection Tominaga, 1994 Shafer S.A. 1985

  5. Dichromatic Reflection Model

  6. Spectral Variation of the Illumination If Spectra of Light Source Changes Spectra ofReflected Light Changes

  7. Black Body T, Kelvin Modelling Daylight Correlated Colour Temperature, CCT Judd et al., 1964 CIE standard Range 4000 – 25000K “Typical Daylight” 5700K

  8. Body Locus Surface Locus 1.0 green chromaticity .75 7k 10k 6k 15k 5k .50 Body locus 4k 25k Surface locus .25 .00 .00 .25 .75 .50 1.0 red chromaticity Modelling Daylight Changes

  9. M1 M1 M2 M2 M1 M2 Assessment of Illumination Conditions M2 M1 b(E1) b(E2) s(E1) s(E2)

  10. Assessment of Illumination Conditions Sun and Skylight Skylight

  11. Assessment of Illumination Conditions

  12. Segmentation d

  13. Results

  14. Dedicated Sensor Design Reflectance of Vegetation and Soil Extension of Daylight Modelling Characteristic of Sensor

  15. Cluster Shape and Location

  16. What did it lead to?

  17. Colour Correction Image taken underCCT = 4700K Re-rendered image to canonical cond. Canonical image atCCT = 3200K

  18. What did it end up with?

  19. A Company • Historie: • 1999, afslutter HJA sit PhD studie. HJA ansættes i det netop startede firma Eco-Dan ApS. • 2000, Eco-Dan ApS lancerer det første komercielle rækkestyringstyringssystem baseret på computer vision teknologi. • Firmaet vinder indtil flere priser for sit produkt, blandt andet EU grand IST prize på 200.000€ • 2007, opkøbes Eco-Dant af AgroCom der blandt andet ejer CLAES og er en af de største producenter af landbrugsmaskiner • 2008, firmaet ligger stadig i Kvistgård og beskæftiger 10-15 personer med udvikling af computer vision soft- og hardware til landbrugssektoren

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