A method and system is disclosed for triggered operation of a variable auxiliary pilot based on RF conditions. The voltage boosting circuit includes boosting capacitors and switches. If a determination of being unquestionably a telecine-converted signal is continued for a predetermined number or more of fields, an instruction signal, which instructs to perform inter-field interpolation on the input interlaced signal, is outputted. Based on a change of scale of the candidate image, it may be determined that the motor vehicle and the pedestrian are expected to collide, thereby producing a potential collision warning. The partitioning member and the space holding members are bonded by a water-solvent adhesive in which a water-soluble moisture-absorbing agent is dissolved.