ERSC 3P07 Lecture Notes - Lecture 5: Senescence, Normalized Difference Vegetation Index, Photosynthesis
26 Feb 2016
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Document Summary
Lecture 5: transformations of image data part ii. Spectral transformations: used to modify pixel brightness values based solely on each pixel"s value (aka: a point operator). Spatial transformations: used to modify a pixel"s brightness value based on the values of the surrounding (neighbourhood) pixels (aka: a local operator). Spectral transforms alter spectral (or feature) space and ignore spatial information. Ecosystem, regional, and global scales: crop yield, biomass amount, primary productivity, canopy closure, leaf area index (lai, species identification, disease detection (disease infestation, forest clear-cut mapping, forest fire mapping, measure biodiversity. Type of stress: moisture deficiency, maturity, internal leaf damage. Note blue shift of the red edge . Study of the relationship between vegetative growth and the environment. Senescence chemical, physical, biological changes in plant leaves. Plowing, planting, emergence, growth, maturity, harvest, and fallow. Increased visible reflectance resulting from a blue shift of the red edge . Leaf senescence: spectral reflectance characteristics of sweetgum leaves.
