The exposure time command technique has a digital word estimator finding the values of green pixels as digital words (400). A counter mechanism (410) has a counter (CntR) finding the green pixels in a set reference value, and multiple counters (CntP(1)-CntP(N)) counting green pixel levels above a set level. Further counters (CntM(1)-CNtM(N)) count green pixels below a set level. A comparator (430) adds and compares green pixels above the set level fro the counters, producing a maximum value (MAX1). Similarly a lower pixel green level (440) is calculated and output (MAX2). The various levels drive a command (450) which provides a setting (UPDATE) or exposure (RATE) to an exposure time generator (460).
CMOS transistor image detector exposure time command technique having green pixel digital word collector and counters finding reference/minimum/maximum levels and command levels interpreting and exposure setting.