Dr. John Miller is engaged in research related to the use of physical models for the quantitative interpretation of high spectral resolution digital image data from airborne and satellite sensors. Research methods involve the use of field spectrometers, solar radiometers, and airborne digital data collection with the Compact Airborne Spectrographic Imager (CASI), with image analysis using hyperspectral image analysis software. Problems investigated include: atmospheric correction of image data to surface reflectances, interpretation of water colour spectra in terms of constituent concentrations and extraction of forest canopy information on biochemical constituents and canopy architectural parameters.