CCTV locations

Author
Discussion

Too Late

Original Poster:

5,092 posts

234 months

Thursday 27th November 2014
quotequote all
CCTV help....
I have 2 Hikvision bullet camera I will be installing this weekend.
http://www.hikvision.com/Es/Products_show.asp?id=7...

Image Sensor: 1/3" Progressive Scan CMOS
Min. Illumination: 0.07Lux @ (F1.2, AGC ON) ,0 Lux with IR
Shutter time: 1/25(1/30) s to 1/100,000 s
Lens: 4mm@ F2.0 (6mm, 12mm optional)
2048 × 1536:
Angle of view: 70°(4mm), 43.3°(6mm), 20.6°(12mm)
1920 × 1080:
Angle of view: 79°(4mm), 49°(6mm), 23.2°(12mm)
Lens Mount: M12
Day& Night: IR cut filter with auto switch
Wide Dynamic Range: Digital WDR
Digital noise reduction: 3D DNR
Compression Standard
Video Compression: H.264/M-JPEG
Bit Rate: 32 Kbps ~ 16 Mbps
Dual Stream: Yes
Image
Max. Image Resolution: 2048×1536
Frame Rate: 50Hz: 20fps (2048 × 1536), 25fps (1920 × 1080), 25fps (1280 × 720)
60Hz: 20fps (2048 × 1536), 30fps (1920 × 1080), 30fps (1280 × 720)
Image Settings: Rotate mode, Saturation, Brightness, Contrast adjustable by client software or web browser
BLC: Yes, zone configurable
ROI: Yes, up to 4 configurable areas







My plan is to install them on the red circles in the photo below
the brackets mean cant look round the corner corners so will be running parallel with the wall. Is this a good location?


megaphone

10,694 posts

250 months

Thursday 27th November 2014
quotequote all
What are you trying to achieve with CCTV?

General surveillance? Visual deterrent? Identifying faces?

The positions you have indicated will achieve the first two but probably not the later. I'd want something on the front door, so you can identify people approaching, can also send you a motion activated email when someone turns up at the door.


Henry-F

4,791 posts

244 months

Thursday 27th November 2014
quotequote all
The problem is you have got wide angle, fixed lens cameras. This means that as you move away from the camera your pixels spread out very quickly. You soon become a small blob on the screen and can't be identified.

CCTV is good for long tunnels of vision where identification can take place along the length of the tunnel. Bad for wide arcs of vision for the reasons given above. Guess how everyone draws CCTV on a plan? Yep, wide arcs of vision smile

If you use varifocal cameras that can be optically zoomed in and out during installation you can balance out detail captured with area covered. It isn't necessarily about what the facade of your house looks like, more it's setting and where people are likely to come from. Have them walk towards the camera as they approach what you are trying to cover.

I don't know because I haven't seen the plot but my initial thoughts were a camera to the left of the garage covering the entrance to the property and the car. A camera by the door (on the assumption people will walk towards it) looking towards the entrance of the property and also parked cars. The problem is I doubt that wants to be 75 degrees angle of view.

You will probably need a camera looking the other way as well. I can't tell what is to the right of your house looking from the front. I'm assuming a wall in front.

To give proper advice I would need to see the property via the internet using a program that allows me to take measurements whilst discussing exactly what you are hoping to achieve. But you do start at a big disadvantage by choosing wide angle fixed lens cameras.

Henry smile

Edited by Henry-F on Thursday 27th November 19:29

Too Late

Original Poster:

5,092 posts

234 months

Friday 28th November 2014
quotequote all
Henry-F said:
The problem is you have got wide angle, fixed lens cameras. This means that as you move away from the camera your pixels spread out very quickly. You soon become a small blob on the screen and can't be identified.

CCTV is good for long tunnels of vision where identification can take place along the length of the tunnel. Bad for wide arcs of vision for the reasons given above. Guess how everyone draws CCTV on a plan? Yep, wide arcs of vision smile

If you use varifocal cameras that can be optically zoomed in and out during installation you can balance out detail captured with area covered. It isn't necessarily about what the facade of your house looks like, more it's setting and where people are likely to come from. Have them walk towards the camera as they approach what you are trying to cover.

I don't know because I haven't seen the plot but my initial thoughts were a camera to the left of the garage covering the entrance to the property and the car. A camera by the door (on the assumption people will walk towards it) looking towards the entrance of the property and also parked cars. The problem is I doubt that wants to be 75 degrees angle of view.

You will probably need a camera looking the other way as well. I can't tell what is to the right of your house looking from the front. I'm assuming a wall in front.

To give proper advice I would need to see the property via the internet using a program that allows me to take measurements whilst discussing exactly what you are hoping to achieve. But you do start at a big disadvantage by choosing wide angle fixed lens cameras.

Henry smile

Edited by Henry-F on Thursday 27th November 19:29
Thanks Henry for the reply. Wow this is tough.

So i have 2 bullet cams with 1 dome for the front porch area.
The reasoning to my camera location is that they are out of hand reach, no on can grab to turn them.

The dive in the design is slightly different to what we have, we have a drive in and out drive so people can access the house from each side from the pavement.

Thanks
N

megaphone

10,694 posts

250 months

Friday 28th November 2014
quotequote all
So you already have a camera on the porch? In that case the other positions are fine to give you overall surveillance of the front drive. Camera positioning is also governed by cabling, can you wire neatly & easily to the positions?

Too Late

Original Poster:

5,092 posts

234 months

Friday 28th November 2014
quotequote all
megaphone said:
So you already have a camera on the porch? In that case the other positions are fine to give you overall surveillance of the front drive. Camera positioning is also governed by cabling, can you wire neatly & easily to the positions?
I will be running the cables through the joists inside as i am currently halfway through the build.

Thanks for the replies
N