PlantEye is a 3D laser scanner specifically designed to assess plants in 3D and computes a diverse set of plant parameters. The sensor projects a thin laser line in near infrared (940 nm) on the plants, which is reflected to a camera integrated in the backend of the PlantEye. The camera captures 2D pictures of the laser line, which are used to compute height profiles (the laser line on the 2D image is bent in function of the distance between the plant material and the sensor). By moving the PlantEye over the plant material or plant canopy at constant speed, many 2D height profiles are generated with are then batched in order to generate a 3D point cloud.
PlantEye Scanning Ranges (x- and z-direction)
PlantEye can be delivered with different measurement ranges and resolutions, which depend on the application and research question. In general the larger the measurement ranges the lower the resolution. PlantEye cannot be switched from one range/resolution to another. It needs a recalibration, which can only be performed at PHENOSPEX. The graph below shows the scanning width in X direction depending on the distance from the scanner (for PlantEye F500) as well as the corresponding resolution in X and Z direction.
PlantEye Scanning Ranges (y-direction) and definitions
The scanning range in y-direction (direction in which the PlantEye is moved over the plants) depends on the transporting device and the length of Plant-Field. It can vary between a few centimeters up to 250 m or longer.
The scanning range in y-direction is defined by the Enable signal via the External IO socket (see Pin Layout). PlantEye records profiles while the enable signal is set to high and stores all profiles in a Plant-Field. A Plant-Field can be divided into many Sectors to generate subsamples. All the plant material or the plant canopy within each sector of a Plant-Field is integrated and plant parameters are computed for everything attributed to this sector. PlantEye cannot dissect individual plants automatically.