Low-resolution of facial images drastically lowers the effectiveness and reliability of

facial recognition. This report reviews research based on the resolution of CCTV cameras.

The focus was confined to addressing the problem as to why CCTV cameras have been

capturing lower resolution images while other cameras have become very powerful; effects of

increasing the number of pixels in the CCTV chips for better resolution are discussed; the

relationship between camera TVL (Tele Vision Lines) and horizontal resolution for the

digital system is also identified. Findings suggest that most footage captured by CCTV

cameras have been known to have inferior quality due to poor resolution hence the loss of

evidence in the event of a case requiring court evidence.