GhostCam: how it works (technical explanation)

A number of avid ghosthunters have enquired about the technology we use to bring you semi-live spectral images from Ordsall Hall.

Our GhostCams are provided by Axis Communications and Sony, both market leaders in network video products.

Each camera takes a snapshot every 15 seconds and sends it to our web server, which then keeps the images for 24 hours.

Camera 1, in the Great Hall, is a Sony SNC-DH180 network camera, using the light in the Great Hall during daylight hours, and it's own inbuilt infrared illuminators at night.

Camera 2, in the Star Chamber, is an Axis 221 day and night camera. During daylight hours the room is illuminated by the lighting in the Star Chamber, but at night the camera switches to infra-red illumination (this is why the night-time images are black and white). The room is illuminated by an Axis ACC IR illuminator at 850mm, 60 degrees width, from just above the camera.

The new Camera 3, in the Great Chamber, is a Sony SNC-DH180 network camera, using the light in the Great Chamber during daylight hours, and it's own inbuilt infrared illuminators at night. 

This page was last updated on 16 June 2011