13 research outputs found
Nondestructive quantitative analysis of water potential of tomato leaves using online hyperspectral imaging system
Tomatoes have different water requirements in each growing period. Excessive water use or insufficient water
supply will affect the growth and yield of tomato plants. Therefore, precise irrigation control is necessary during cultivation
to increase crop productivity. Traditionally, the soil moisture content or leaf water potential has been used as an indicator
of plant water status. These methods, however, have limited accuracy and are time-consuming, making it difficult to be put
into practice in tomato production. This study developed an online hyperspectral imaging system to measure the leaf water
potential of tomato nondestructively. Linear Discriminant Analysis was utilized to automatically and quickly extract the leaf
images, with the recognition accuracy of 94.68% was achieved. The mathematical processing of Standard Normal Variate
scattering correction was used to remove the spectral variations caused by the defocused leave images. The developed leaf
water potential prediction model based on the spectral image information attained using the developed system achieved the
standard error of calibration of 0.201, coefficient of determination in calibration set of 0.814 and standard error of cross�validation of 0.230, and one minus the variance ratio of 0.755. The obtained performance indicated the feasibility of apply�ing the developed online hyperspectral imaging system as a real-time non-destructive measurement technique for the leaf
water potential of tomato plants
MUSME 2011 4 th International Symposium on Multibody Systems and Mechatronics
El libro de actas recoge las aportaciones de los autores a través de los correspondientes artÃculos a la Dinámica de Sistemas Multicuerpo y la Mecatrónica (Musme). Estas disciplinas se han convertido en una importante herramienta para diseñar máquinas, analizar prototipos virtuales y realizar análisis CAD sobre complejos sistemas mecánicos articulados multicuerpo. La dinámica de sistemas multicuerpo comprende un gran número de aspectos que incluyen la mecánica, dinámica estructural, matemáticas aplicadas, métodos de control, ciencia de los ordenadores y mecatrónica. Los artÃculos recogidos en el libro de actas están relacionados con alguno de los siguientes tópicos del congreso:
Análisis y sÃntesis de mecanismos
; Diseño de algoritmos para sistemas mecatrónicos
; Procedimientos de simulación y resultados
; Prototipos y rendimiento
; Robots y micromáquinas
; Validaciones experimentales
; TeorÃa de simulación mecatrónica
; Sistemas mecatrónicos
; Control de sistemas mecatrónicosUniversitat Politècnica de València (2011). MUSME 2011 4 th International Symposium on Multibody Systems and Mechatronics. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/13224Archivo delegad
Actas de las XXXIV Jornadas de Automática
Postprint (published version