| a href=" cameras are the most common | | | | widespread use of security cameras, |
| method of surveillance. Originally, they | | | | claiming that their use results in loss |
| were analog video, but digital security | | | | of privacy and loss of civil liberties. |
| cameras have become more commonplace. | | | | This is particularly true in London, |
| Digital security cameras do not rely on | | | | where critics have argued that security |
| videotape recorders and subsequently do | | | | cameras exist more for controlling the |
| not have to have the tapes constantly | | | | general populace than for crime |
| replaced. However, the digital file can | | | | prevention. Similar arguments have |
| fill up hard drive space. Higher quality | | | | cropped up in Chicago and New York, |
| security camera images, comparable with | | | | where security cameras have become more |
| DVD quality, only make the files larger. | | | | prevalent. |
| Fortunately, several techniques exist to | | | | Personal security cameras have also |
| solve the problem. One of the most | | | | become more popular. These can be |
| common solutions is the use of motion | | | | plugged into a computer's USB port, and |
| detectors. These signal security cameras | | | | monitor cubicles or single rooms. As |
| when to begin recording, and when to | | | | many of these security cameras have a |
| save power by intermittently filming. | | | | resolution of 4 million pixels, quality |
| People have repeatedly challenged the | | | | is not a problem. |