Calibration Method for Turntable Phenotyping Facilities

  • Technology Readiness Level: 4

Abstract
Researchers at Purdue University have developed a novel calibration method to aid an accurate 3D reconstruction of plants in facilities with a turntable imaging chamber. While higher quality cameras are continually being implemented in plant phenotyping, many of these are not specifically geared for phenotyping facilities and their unique needs. This technology accounts for this context to produce higher quality color scans of the plants along with higher quality image reconstruction. A widely used solution for camera parameter estimation is the extrapolation of equipment specifications via a 2D checkerboard planar calibration target. However, this process is time-consuming and not so feasible for facilities with the turntable imaging chamber. Purdue researchers developed a specific plant shape to function as a 3D calibration target with known specifications. This will then be run through a custom calibration software which automatically generates the equipment specifications. From an operator standpoint, the process begins with imaging a plant target, whose 3D aspect vastly increases the depth of the data collected. This approach eliminates most of the friction in the 2D system, allowing for optimized 3D reconstructions by the turntable machine.This technology is very promising for agricultural operations and drone imagining.

Technology Validation: This technology was validated through a series of calibration efforts in different plant contexts and camera specifications.

Contact Information

Name: Abhijit A Karve

Email: AAKarve@prf.org

Phone: 765-588-3487