In preparation for dreaming and mind-wandering states I was looking at the measures of system dynamics that could be used to trigger mind-wandering. At first I tried the number of clusters that changed state (present or not present in the current frame) to see if there was an increase in the number of changes where there was lots of activity. There did seem to be some link between the change in the number of clusters that changed state, but it also produced lots of spurious activity and showed activity when images appeared static. Since this is quite abstract information I tried to go down a level and track the sum of the distances between clusters and newly segmented pixel regions. After some examination, that seems an even worse indicator of the appearance of changes in the input frames. So I’m going down another level deeper and will just sum the values of pixels in the absolute difference between subsequent frames.