Diffuse correlation spectroscopy (DCS) is an emerging modality for noninvasive deep tissue blood flow monitoring that is becoming increasingly popular; it conducts an autocorrelation analysis of fast fluctuating photon count signals from a single speckle. In this Letter, we show that the same level of deep tissue flow information can be obtained from a much simpler analysis on the spatial distr...

Here we shall examine the phenomenon of surface-scattered light from both leaves and plant canopies. Results from measurements will show that this surface-scattered light — a quasi-specular reflection if the leaves appear shiny — originates at the interface between the air and the cuticle wax layer. Unlike light that is diffusely reflected by the interior of a leaf, the surface-scattered light ...