Big Bother Can See You Now: Part 3

Big Bother Can See You Now: Part 3

Well, the camera has been up for a few weeks now. And everything seems to be working well.

While I was away for a few days, the video signal was lost. I immediately assumed it was the home plugs or something wrong with the camera or recorder. But after a bit of diagnostic trial and error I realised it was the cheap 5 port network switch I had connected to the NVR. So I removed that and everything started working again immediately.

Below you can see a couple of sample images from the camera. Obviously the daylight picture is much clearer than the black and white night time one. But even that is pretty good considering the mixture of infra red and street lighting.

day01_ night01_


With the combination of the XV1080VP and the XRN0808E, there are quite a few settings to tinker with to adjust the appearance of the image. If you order the same recorder and a different camera, then it’s my understanding that the settings available to you may well be different to those available to me for this camera/recorder combination.

I’ve pretty much left things as they were, I boosted the gamma slightly to bring a bit more brightness to the images, and set the noise reduction to help smooth out the noisier night time image:



I contacted Xvision and to clarify some of the finer points of the setup as the manual was a little light in some details. It turns out the Automatic Switching Delay is measured in seconds, and provides a bit of a buffer to avoid the camera switching modes due to temporary lighting changes that might occur.

The Night to Day and Day to Night values are the LUX levels at which the camera determines the conditions have changed sufficiently to switch modes. It’s therefore possible to prevent the camera switching to IR (night) mode entirely. Either by setting the Day & Night dropdown to ‘Day’ or by setting the LUX values sufficiently highly.

I’m going to continue playing with the day to night and night to day thresholds, as I feel it switches to infra red a bit too eagerly at the moment.

3D DNR (Digitial Noise Reduction) works by comparing pixel values over several frames, and using that to smooth out any noise artefacts present. However, this can introduce some blurring to moving objects in the image, so it should be used very sparingly. After all, you probably want to be able to recognise people’s faces and car number plates in your recordings.

Wide Dynamic Mode attempts to get as wide a dynamic range as possible in your images. When combined with BLC (Back Light Correction) you should be able to get very usable images in most lighting conditions.