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.

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

How does it work?

We combined our existing 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 dataset without the need for computationally complex sensor fusion algorithms. Hence we provide both morphological and physiological parameters in one shot. Of course, we keep all key assets of the PlantEye F400 model and PlantEye F500 also works in all environments and can be operated in full sunlight.

3D scanning with multispectral

 In addition to the 3D scanning principle of PlantEye F400, 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.

What parameter 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, Light penetration depth, Leaf coverage.

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. The wavelength the PlantEye measures can be chosen from a selection of available bandwidths to match the research application. Each point of the 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)
  • Customization of the wavelength following your need and applications

Customize your PlantEye F500 and chose the bands of interest

PlantEye F500 has a standard set of 4 wavelengths in Red, Green, Blue and Near-Infrared. However, those can be customized from a variety of available LEDs between 400-900n ± 20nm to find the application relevant wavelength.

Standard wavelengths
Peak Wavelength
Spectral half-width
Red (R)
624 – 634 nm
20 nm
Green (G)
530 – 555 nm
20 nm
Blue (B)
465 – 485 nm
20 nm
Near-Infrared (NIR)
720 – 750 nm
20 nm

Technical information of PlantEye F400 and PlantEye F500

PlantEye F400
PlantEye F500
Morphological parameters
9
10
Spectral sensitivity
940 nm
380 – 900 nm
Spectral bands
up to 7
Temperature control
Laser temp stabilized
Laser, LED & camera temp controlled
Weight
5.1 kg
5.3 kg
Dimensions
420 x 200 x 92 mm
440 x 210 x 99 mm
Input / Output
Digital enable signal
External trigger
Digital enable signal
External trigger
RS232 / RS485*
7 Channel Flash TTL Output
Measurement rate
50 XZ-profiles / s
50 XZ-profiles / s
Temperature range
0…50 °C
-10…50 °C
Humidity
 0 – 100% rel.
0 – 100% rel.
Laser class
1M
1M
Power requirements
24VDC or 230VAC
24 VDC nominal
10 – 36 VDC
Power consumption
30 W
50 W
Protection class
IP 67
IP 65
Connectivity
WiFi
WiFi, Ethernet
Y-Resolution (Vscan = 50mm/s)
1 mm
1 mm
Resolution (Z-Range 20cm)
X
0.22 mm
0.19 mm
Z
< 0.1 mm
< 0.1 mm
Resolution (Z-Range 120cm)
X
0.8 mm
0.7 mm
Z
0.2 mm
0.2 mm
Resolution (Z-Range 180cm)
X
1.8 mm
1.5 mm
Z
0.5 mm
0.5 mm