A safety sign and methods are shown with advantages such as being more visible in poor conditions such as snow, dust, fog, low light, etc. In use, a process is initiated for determining whether to scan data, during communication of the data over the network. The liquid is removed from the wetted body to provide a catalyst support comprising an entangled fibre and carrier material. A mosaicking technique of the first and second image may be performed if the one salient pixel of the first image and the one salient pixel of the second image are registered successfully.