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Site specific weed management: mapping the tempo-spatial development of purple nutsedge ( Cyperus rotundus ) Hanan Eizenberg PowerPoint PPT Presentation


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The 2 nd International Conference on: Novel and Sustainable Weed Management in Arid and Semi-Arid Agro-Ecosystems. Site specific weed management: mapping the tempo-spatial development of purple nutsedge ( Cyperus rotundus ) Hanan Eizenberg Tal Naamat, Ran Lati , Tal Miller and Roy Efron

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Site specific weed management: mapping the tempo-spatial development of purple nutsedge ( Cyperus rotundus ) Hanan Eizenberg

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Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

  • The 2nd International Conference on: Novel and Sustainable Weed Management in Arid and Semi-Arid Agro-Ecosystems

Site specific weed management: mapping the tempo-spatial development of purple nutsedge (Cyperusrotundus)

Hanan Eizenberg

Tal Naamat, Ran Lati, Tal Millerand Roy Efron

Dept. of Weed Research, ARO, NeweYa’ar Research Center, Ramat Yishay 30095, Israel


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

  • Objective:

  • The main objective of the entire study is to develop a multiple approach for the detection of purple nutsedge spatial development

  • To achieve our objective, the state of art in detection technologies for both above and sub-surface spatial development were used


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

  • Our approach thus includes:

  • Spectral analysis of purple nutsedge obtained from satellites or airborne

  • Leaf shape analysis obtained from image data

  • photogrammetric (3D) analysis obtained from image data and laser (LIDAR)

  • Modeling spatial sprouting of the weed under different environmental conditions

  • Modeling the soil-subsurface development and its reflectance on purple nutsedge spatial sprouting


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Topic

Technology

Modeling spatial growth for the above and sub-surface

RGB high resolution camera; 0.5x0.5 mm pixel size. Lati et al. Minirhyzotronnon destructive video camera. Naamat et al.

RGB high resolution camera; 0.5x0.5 pixel size. 3D LIDAR

scenes and photogrammetric. Lati et al. RGB high resolution camera; 1x1mm pixel size. Efron et al.

Close range remote sensing

Aerial RGB high resolution camera; 50x50mm pixel size.

Tal Miller et al.

Far range remote sensing


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Examples 1.

Monitoring the sub-surface development of purple nutsedge using minirhyzotron video camera


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

13.2.08

9.3.08

23.3.08


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Examples 2.

Developing a robust method for purple nutsedge detection under varies light conditions

or

How to overcome the shading effect?


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Fig. 1

1-a

1-b

1-c

2-b

2-a

2-c

3-a

3-b

3-c

4-a

4-b

4-c


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Biological model

Above soil surface

growth model

Purple nutsedge spatial growth model

Sub surface

growth model


Laser scanner description

Laser Scanner (description)

Color digital camera

Laser Scanner


Results from cotton field newe yaar israel

Results from cotton field, NeweYaar, Israel


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Ranging - travel time based measurement

Knowledge of the laser beam direction  determination of point in space

Direct measurement of 3D coordinates of the objects in space

Panoramic scan - complete 3D depiction of the surveyed scene can be achieved – generates 3D point clouds

Laser Scanner (principles)


Examples 3 weed mapping using web cam rgb

Examples 3. Weed Mapping using web cam (RGB)


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

  • Remote sensing using close range, high resolution (2 mega-pixel) RGB cameras

  • Collecting geospatial information using dGPS (sub-meter accuracy)

  • Logging information onto an onboard computer


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

GPS Antenna

Camera

1

Field Of View

Camera

2

Field Of View

Computer

ECPA - July 2008


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

14_right_cam.avi

MOV07482.MPG


Binary image

Binary Image


Preliminary classified image

Preliminary Classified Image


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Secondary Classified Image

dGPS Data

Weed Map


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Weed Map

  • Number of weeds per image

  • Area of the weeds


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Summary

Biology

Technology

Remote sensing for purple nutsedge detection

Input of meteorological data (T°C; PAR)

Close range

Terrestrial sensors

RGB, NIR, LIDAR

Far range

aerial sensors

Satellite; airborne

Soil Sub-surface model

Above surface growth sub-model

Developing an algorithm for weed detection – range related

Purple nutsedge

growth model

Fixing data into GIS (using GPS)

Creating a purple nutsedge spatial distribution map

Field history


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

Taking home massage

Integration of the biological and technological means for purple nutsedge detection support and complements each other, and may provide a new dimensions in its precision management.

message


Site specific weed management mapping the tempo spatial development of purple nutsedge cyperus rotundus hanan eizenberg

  • Thanks

  • To my students, Tal N., Tal M., Ran, Roy.

  • To my colleagues from the department of Weed Research Yosi, Radi, Dani, Tal L., Guy, Evgeni.

  • To Victor, Yafit and Sagi.

  • To the Chief Scientist from the Ministry of Agriculture for funding the research.


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