Transactions of the ASAE · 1992 · 35 citations · 0 references
AgricultureCrop SciencesPlant SciencesComputer VisionCrop PhysiologyPlant PhysiologyAgricultural Machine VisionCrop Stress DetectionLeaf PhysiologyPlant Stress DetectionWater Status MonitoringWilt DiseasesCarbon Dioxide AssimilationCarbon Source AssimilationPlant MonitoringPlant Water Status SensingTomato WiltVertical MotionsVertical Movement AnalysisWilt Symptom Recognition
The vertical movement of leaf-tips of four plants were tracked simultaneously by a computer vision system. Fully expanded leaves of tomato plants were found to have linear vertical motions in response to both water stress level and carbon dioxide assimilation rate. Growing leaves had complex motions which were less useful for monitoring water stress level. The computer vision detected the onset of wilt before physiological injury took place and triggered irrigation at predetermined leaf tip deflections.