The prevention of illegal iiLtruding into buildings is very important. This pape エ presents two security systems for the prevention of illegal intruding using image processi 皿 g , One is an intluder detection system using infrared c ε era and range 且nder , and ano も her is alock − control system using face identification .1皿 the intruder detection system , 且rst , the intruder is judged by comparing his silhouette With human features dictionamy , and measuring the height ofintruder using a range

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... data. Secondly , the intruder is tracked by its motio 皿 vector , size and average intensity . The lock − control systeln identify a face features in normalized face image for judgment whether it should unlock a door or not . Experiments show that these system is suitable fbr automated security syste 皿 s