A direct digital control ( ddc ) system was adopted , which can grab the dynamic image of fruits in real time , and send the results of image processing to the parallel port of computer , then control several step motors " status at the same time 本研究采用計(jì)算機(jī)直接數(shù)字控制方式,對動(dòng)態(tài)水果圖像進(jìn)行實(shí)時(shí)采集,并通過計(jì)算機(jī)的打印端口輸出圖像處理結(jié)果,實(shí)現(xiàn)同時(shí)對多個(gè)執(zhí)行器的動(dòng)作狀態(tài)進(jìn)行控制。