an accumulator circuit configured to calculate a plurality of superpixel values, each of the superpixel values based on a sum of pixel values of a set of pixels associated with the superpixel value, the set of pixels selected from a detection row of a current frame of a sensor, wherein the set of pixels associated with each of the plurality of superpixel values is selected as a set of the pixels of the detection row that are interleaved with pixels associated with another of the plurality of superpixels values;

a comparator circuit configured to calculate a difference between each of the plurality of superpixel values and a corresponding stored superpixel value generated from a previous frame of the sensor;

a thresholding circuit configured to determine if the differences exceed a superpixel threshold value and to increment a hit counter in response to the determination; and

a detection circuit configured to generate a detection signal in response to a determination that the hit counter exceeds a hit count threshold.