Panasonic "Light Detection Control"

[cglaeser 0]

I have a Panasonic WV-NW502S, and the documentation is not clear (big surprise) about "Light Detection Control". When this option is set to "On", does that mean VMD (video motion detection) will ignore dimmer/brighter changes in lighting? Or is that the function for "Off"? I've tried this option both ways, and it doesn't seem to have much impact.

 

As the sun rises in the morning and sets in the evening, the camera tends to have too many VMD false alarms. If I had to guess, the camera takes a snap shot and then uses that frame for an extended period of time to detect motion in future frames. Instead, the camera should update the baseline frame over time, perhaps by combining a number of frames to create a rolling average. As the sun begins to rise or fall, the VMD will issue false alarms every ten minutes or so. Comparing frames second by second, there is no apparent motion or change in light intensity when the false alarm is generated, but comparing frames ten minutes apart, there is a change in light intensity which is apparently causing the false VMD alarms.

 

Comments?

 

Best,

Christopher

[PeliX 0]

Similar experience with the VMD function of WV-NW484 and WV-SW175. Found manuals for other models with the same type user interface and I think the first one below here might be the correct explanation:

 

http://panasonicspecassist.ca/OperatingInstructions/WVSF530_SF540_Series_Oper_Man.pdf

 

[Light detection control]

Select “On” or “Off” to determine whether or not to suspend video motion detection affected by brightness

change such by a dimming level control.

• Default: Off

IMPORTANT

• “Light detection control” may not work when brightness change is too small.

• When “On” is selected for “Light detection control”, the video motion detection may not be performed

even when detecting a subject moving over the whole screen.

 

http://www.manualslib.com/manual/419888/Panasonic-Wv-Nw502s.html?page=59#manual

 

[Light detection control]

Select "On" or "Off" to determine whether or not to detect video motion affected by brightness

change such by a dimming level control.

•Default: Off

Important:

• "Light detection control" may not work when brightness change is too small.

• When "On" is selected for "Light detection control", the video motion detection may sometimes not be performed

even when detecting a subject moving over the whole screen.

 

 

The WV-NW484 has an additional setting: "Scene change detection", seems almost like they mixed up explanation of this function with the “Light detection control”.