About 60% of the accident is an accident near intersection. Also, to recognize a pedestrian on the crosswalk automatically in aging society's approaching, and to inform a vehicle driver about the existence and to prevent an accident from happening are important on the commonweal. Therefore, we propose the safe driving support system using an improvement-type background finite difference method. In this report, we examine about the optimization of the parameter to reduce mistaking. Moreover, we divided in case of the condition of weather and sunlight by the brightness change percentage to use optimization parameters.
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