1. An apparatus for monitoring a biological process comprising a processor performing the steps of: receiving image data relating to the biological process, said image data corresponding to frames comprising a plurality of pixels; dividing each frame into a plurality of regions and each region into a plurality of subregions; filtering pixels in each subregion according to a pixel intensity range to provide a filtered output of pixels; comparing the filtered output of pixels in a first area of each subregion to a second area of each subregion to produce a signal for each subregion; transforming each signal according to each signal's current level to produce a transformed output signal for each subregion; and analyzing the transformed output signals for the plurality of subregions to monitor the biological process.