Stress Detection in Crops with Hyperspectral Remote Sensing and Physical Simulation Models
Bibliographic record
Abstract
Progress made on the detection of stress in heterogeneous crop canopies with hyperspectral remote sensing imagery is presented.High-spatial resolution multispectral remote sensing imagery was collected in 2002, 2003 and 2004 over vineyard and olive orchards in Spain.Imagery acquired with the Compact Airborne Spectrographic Imager (CASI) and the Reflective Optics System Imaging Spectrometer (ROSIS) in the visible and near infrared wavelength regions 400-950 nm at 1 m resolution, and with the Airborne Hyperspectral Scanner (AHS) in the reflective and thermal regions at 2 m resolution enabled the study of narrow-band vegetation indices and model simulation for estimation of chlorophyll content for chlorosis detection at the tree and vine level, as well as deriving thermal information function of the stress status.Ground data collection consisted of measurements of crown transmittance with a PCA LAI-2000 and geometrical measurements of crown projected area, height, crown cross-section, and biochemical constituents such as chlorophyll a+b and carotenoids, enabling the estimation of crown leaf area index, crown leaf density, biophysical variables related to the crown intercepted radiation, such as crop yield and canopy fractional cover, as well as crop functioning through chlorophyll content estimation.Leaf and canopy simulation models, such as PROSPECT, SAILH, FLIM, and rowMCRM were used and the scaling up methodology presented.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".