PlantEye on a automation machine in greenhouses

PlantEye F500 Multispectral 3D Scanner for plants

We combined the strength of 3D imaging with the power of spectral imaging in a single sensor – the PlantEye F500. PlantEye F500 captures plants in 3D and combines it on the fly with a 4-channel multispectral camera in the range between 400 – 900nm. This unique hardware-based sensor fusion concept allows us to deliver spectral information for each data point of the plant in X, Y, and Z-direction.

Why combine 3D & spectral imaging?

We combined our existing 3D imaging concept of PlantEye F400 with a multispectral flash unit, that illuminates the plant and measures up to 4 wavelengths immediately after the 3D acquisition of the plant in high frequency. This way we can overlay 3D and multispectral information in one combined data set without the need for complex sensor fusion algorithms.

Hence we provide both morphological and physiological parameters in one shot. PlantEye F500 also works in all environments and can be operated in full sunlight.

Tomate plant phenotyping 3D RGB NIR and NDVI

3D point cloud with different spectral information of a tomato plant captured with PlantEye F500.

 

3D scanning of plants with spectral information

In addition to the 3D scanning principle PlantEye F500 adds a multispectral flash unit next to the laser. After acquiring the 3D information, this unit illuminates the scene with several colors. The images on the right show the view of the camera. For each color, one image is taken by the camera to measure the reflectance of the plant in that specific wavelength.

Cabbage | RGB Dual scan | Navigate through 3D models of plants or complete fields to get in dept information

Sugar Beet | NDVI | Single scan

Sugar Beet | NDVI |Navigate through 3D models of plants or complete fields to get in dept information

What parameters can we measure?

Previous PlantEye generations can compute automatically a wide variety of morphological parameters such as: Plant height, 3D leaf area, Projected leaf area, Digital biomass, Leaf inclination, Leaf area index, Leaf Angle, Light penetration depth.

In addition to that, PlantEye F500 can now measure a spectral reflectance for each point of the plant. Each wavelength can be statistically analyzed individually to calculate greenness, chlorophyll levels or to detect senescence.

Next to that, wavelengths can be combined into spectral indices such as Normalized Digital Vegetation Index (NDVI), Enhanced vegetation index (EVI), Photochemical Reflectance Index (PRI) and many others.

Each point of the 3D point cloud generated by PlantEye (stored as an open PLY format) contains:

  • X, Y, Z coordinates in space
  • Reflectance in Red, Green, Blue, and Near-Infrared
  • Reflectance of the 3D Laser (940nm)

 

Technical Specifications:

PlantEye F500
Morphological parameters
10
Spectral sensitivity
380 – 900 nm
Spectral bands
4 (RGB & NIR)
Temperature control
Laser, LED & camera temp controlled
Weight
8.3 kg
Dimensions
440 x 210 x 99 mm
Input / Output
Digital enable signal
External trigger
RS232 / RS485*
7 Channel Flash TTL Output
Measurement rate
35 XZ-profiles / s
Temperature range
-10…50 °C
Humidity
0 – 100% rel.
Laser class
1M
Power requirements
24 VDC nominal
10 – 36 VDC
Power consumption
50 W
Protection class
IP 65
Connectivity
WiFi, Ethernet

Z- range is the distance measured from the scanner down. So the maximum distance from the pot or ground up to the scanner.

Y-Resolution (Vscan = 50mm/s)
1 mm
Resolution (Z-Range 40cm)
X
0.19 mm
Z
< 0.1 mm
Resolution (Z-Range 120cm)
X
0.7 mm
Z
0.2 mm
Resolution (Z-Range 150cm)
X
1.5 mm
Z
0.5 mm