Towards Low-Cost Hyperspectral Single-Pixel Imaging for Plant Phenotyping

Sensors (Basel). 2020 Feb 19;20(4):1132. doi: 10.3390/s20041132.


Hyperspectral imaging techniques have been expanding considerably in recent years. The cost of current solutions is decreasing, but these high-end technologies are not yet available for moderate to low-cost outdoor and indoor applications. We have used some of the latest compressive sensing methods with a single-pixel imaging setup. Projected patterns were generated on Fourier basis, which is well-known for its properties and reduction of acquisition and calculation times. A low-cost, moderate-flow prototype was developed and studied in the laboratory, which has made it possible to obtain metrologically validated reflectance measurements using a minimal computational workload. From these measurements, it was possible to discriminate plant species from the rest of a scene and to identify biologically contrasted areas within a leaf. This prototype gives access to easy-to-use phenotyping and teaching tools at very low-cost.

Keywords: Fourier patterns; hyperspectral imaging; plant phenotyping; proximal sensing; single pixel imaging.

MeSH terms

  • Costs and Cost Analysis*
  • Hydrangea / anatomy & histology
  • Imaging, Three-Dimensional*
  • Phenotype
  • Plant Leaves / anatomy & histology
  • Plants / anatomy & histology*
  • Spectrum Analysis*