J. Brasington et al., Detecting significant sediment motion in a laboratory flume using digital video image analysis, EARTH SURF, 25(2), 2000, pp. 191-196
A video analysis method for monitoring sediment transport and sorting proce
sses in a laboratory flume is presented. Video taken through the glass side
-wall of a laboratory flume is captured using a digital CCD (charge-coupled
device) camera and significant movements between individual frames are det
ected using image analysis. This method involves direct subtraction of the
brightness numbers of pixels in sequential video frames, followed by thresh
olding to produce binarized images of significant change, above the inheren
t level of system noise. Experimental results showing dilation of a gravel
framework and rapid infiltration of fines just prior to entrainment are dis
cussed. Copyright (C) 2000 John Wiley & Sons, Ltd.