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phil_gt - 11 Dec 2006, 05:27 am
can ir cameras be used inside looking outside at objects????
Security Cameras
»can ir cameras point out windows
( >> )msecure - 11 Dec 2006, 07:20 am
Well, during the day is fine, once it's night time you'll only see some white
rings because of the reflection.
rings because of the reflection.
phil_gt - 11 Dec 2006, 09:09 am
ah ok so it wont work at night basically? is there any way to avoid this before i start drilling holes to feed cables outside?
what are these white rings i thought ir was invisible or have i bought a camera whihc shines white?????
what are these white rings i thought ir was invisible or have i bought a camera whihc shines white?????
Metal Shaper Man - 11 Dec 2006, 09:51 am
Leaving the technology out, the human eye can’t use ir light to see but the camera can. Therefore, the ir light reflects off the glass back into the lens washing out the picture.
Thomas in BP - 11 Dec 2006, 11:56 am
No matter if you use IR or not you should expect images to be distorted to some degree, because you will probably get a little bit of 'fish eye effect' where the sides of the image arches slightly and you also risk getting a 'ghost image' by the room behind the camera being mirrored in the window.
phil_gt - 11 Dec 2006, 01:43 pm
okie dokies then
well this is the cctv i've bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=120061154747&rd=1&rd=1
thinkin of mounting it on the outside wall now and feed wired through a drilled hole which could i guess be filled with silicon or expanding foam to keep out water...
is it true these cameras go black and white coz if so i've been mislead a bit as it states colour ir cctv:(
well this is the cctv i've bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=120061154747&rd=1&rd=1
thinkin of mounting it on the outside wall now and feed wired through a drilled hole which could i guess be filled with silicon or expanding foam to keep out water...
is it true these cameras go black and white coz if so i've been mislead a bit as it states colour ir cctv:(
Scruit - 11 Dec 2006, 09:32 pm
QUOTE:
okie dokies then
well this is the cctv i've bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=120061154747&rd=1&rd=1
thinkin of mounting it on the outside wall now and feed wired through a drilled hole which could i guess be filled with silicon or expanding foam to keep out water...
is it true these cameras go black and white coz if so i've been mislead a bit as it states colour ir cctv:(
okie dokies then
well this is the cctv i've bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=120061154747&rd=1&rd=1
thinkin of mounting it on the outside wall now and feed wired through a drilled hole which could i guess be filled with silicon or expanding foam to keep out water...
is it true these cameras go black and white coz if so i've been mislead a bit as it states colour ir cctv:(
Looks like one of those that is color during the day and BW at night, with IR ligthing. I'm no expert, but I have never seen a color IR image. It's always B&W.
I would mount it outdoors, not pointing through a window.
CollinR - 11 Dec 2006, 09:49 pm
You can't to my knowledge generate colors with only IR light.
phil_gt - 12 Dec 2006, 07:18 am
okie dokie then hope it hurrys up and comes coz my eye toy webcam is shit :(
the car was egged last night and the only thing i can make out other than the car is a shadow running past into next doors gate and then comes back to edge of my fence then runs off down the street
the car was egged last night and the only thing i can make out other than the car is a shadow running past into next doors gate and then comes back to edge of my fence then runs off down the street
rory - 12 Dec 2006, 07:42 am
[quote:b41ab747cb="Scruit"]
Looks like one of those that is color during the day and BW at night, with IR ligthing. I'm no expert, but I have never seen a color IR image. It's always B&W.
I would mount it outdoors, not pointing through a window.
QUOTE:
okie dokies then
well this is the cctv i've bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=120061154747&rd=1&rd=1
thinkin of mounting it on the outside wall now and feed wired through a drilled hole which could i guess be filled with silicon or expanding foam to keep out water...
is it true these cameras go black and white coz if so i've been mislead a bit as it states colour ir cctv:(
okie dokies then
well this is the cctv i've bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=120061154747&rd=1&rd=1
thinkin of mounting it on the outside wall now and feed wired through a drilled hole which could i guess be filled with silicon or expanding foam to keep out water...
is it true these cameras go black and white coz if so i've been mislead a bit as it states colour ir cctv:(
Looks like one of those that is color during the day and BW at night, with IR ligthing. I'm no expert, but I have never seen a color IR image. It's always B&W.
I would mount it outdoors, not pointing through a window.
they arent True Day Night cameras, so they are not as sensitive to IR, nor without IR are they as sensitive in low light. They are color cameras typically (with high lux levels in most cases - not good for low light color) and they remove the chroma digitally (so it is more sensitive to IR than in full color mode), there is no mechanical IR filter of any kind, as that would, well bring the cost up. Without an IR cut filter, it always picks up IR, including that from the Sun, this is why they have messed up colors, though indoors you will not notice it as much as outdoors, also due to having more colors outdoor such as green (from Bushes, Trees, etc).
I'm not a CCTV camera engineer, and this is just a rough idea from what I've been told by a couple manufacturers. However they do it, basically Color IR cameras are not as sensitive in low light as a True day Night camera, and colors will be affected, if used outdoors especially.
BTW, the reseller doesnt appear to have any CCTV knowledge, as they claim:
"Camera Shot: 1/3 and 1/4 picture sensors"
