GeoVision Motion detection question

[JimS_99 0]

I have a GV 1248 system. No problems, does exactly what I want it to do. My question concerns motion detection.

 

The main reason for installing camera's was to monitor my 2 vehicles when I'm not home, other camera's are installed around the house but are secondary to the car camera. One car sits in my driveway and is app 30' from the camera, the 2nd car is directly in line with the driveway but across the street at app 66'. I installed the car monitoring camera under the eaves directly in line with both vehicles, this is app 16' high. This camera location gives great video of both cars.

 

The problem is that the motion detection works fine for the first vehicle at 30', but for the 2nd vehicle at 66' I can do handstands next to the car and the motion detection doesn't trigger. It will pick up a car going past, but not smaller objects like people. It picks me up when I'm parking the car across the street, but if I sit in the car for a few seconds then exit the car, it doesn't detect any motion until I walk to app 40' from the camera.

 

The GV motion sensitivity slider is set to 9.6, any higher and it gives lots of falsing.

 

The camera I'm using at this location is a Nuvico NVCC-HW3895IR36N-A. GeoVision software version is 8.1

 

I have the camera image centered and focused at 40'. I focused the camera @ 40' using a video test pattern. Is this about the limit of motion detection for people sized objects? Is motion detection determined by the camera or the software? Would a second camera centered and focused directly on the car at 66' be my best alternative?

 

Hope someone can answer this as I've had a lot of vandalism problems with my vehicle across the street. Not being able to detect human movement next to this vehicle is not good.

[CollinR 0]

All CCTV motion detection is based on the percentage of the image the change makes up.

 

The more you zoom into objects the greater the percentage of the feed they take up and hence the more sensitive to their motion your system will be.

[JimS_99 0]

Thanks for the reply ColllinR! I figured it was something like that. I think for my application 2 camera's, one for each vehicle, might be best.