Detecting method for front-parked vehicles at night

1. A detecting method for front-parked vehicles at night, comprising the steps of:

A) sensing by a moving-vehicle sensor if a moving vehicle is within a pre-determined range of a parking area;

B) capturing at least an image of said parking area by a parked-vehicle sensor when said moving-vehicle sensor detects said moving vehicle;

C) determining if said parking area is occupied by extracting at least a reflection of at least a tail light or at least a portion of a back bumper from said image by using a light beam from said moving-vehicle sensor.

2. The method according to claim 1 , wherein said moving-vehicle sensor is an audio sensor, an optical sensor, or an electromagnetic sensor.

3. The method according to claim 1 , wherein said moving-vehicle sensor is located at a same location as said parked-vehicle sensor.

4. The method according to claim 1 , wherein said moving-vehicle sensor is located at a different location from said parked-vehicle sensor.

5. The method according to claim 4 , wherein said moving-vehicle sensor communicates with said parked-vehicle sensor using a wireless technique.

6. The method according to claim 1 , wherein said parked-vehicle sensor comprises an optical detector, a processor and a memory.

7. The method according to claim 6 , wherein said optical detector comprises at least a camera.

8. The method according to claim 7 , wherein said camera operates more frequently at night than during the day.

9. The method according to claim 6 , wherein said memory stores a front-parked vehicle detection algorithm.

10. The method according to claim 6 , wherein said memory stores a passing-by vehicle detection algorithm.