A method for plant leaf area measurement by using stereo vision
نویسندگان
چکیده
The leaf area index (LAI) is an important property of vegetation, for plant growth assessment and for crop models parameterisation. The reference measurements are usually destructive and involve the picking of plants from a given field area and the measurement of the leave area by machine vision. This way to proceed is however destructive, tedious and expensive. To be accurate the sampled surface must be sufficient. Indirect values have thus been developed, based on canopy transmittance or on the reflection in specific wavelength such as the simple ratio, the normalized difference vegetation index (NDVI, Aparicio, 2000). The inconvenient of those methods is to be influenced by the chlorophyll content or the soil type and to saturate when the soil is completely covered.
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