Page No. 45
To store video in a practical way and maximise the number of clips that
can be stored on a single SD memory card the security light compresses
video in to frames that match the video standard of 320 x 240 pixels or
QVGA. Video and photos still have the same field of view but video offers
considerably lower resolution than a photo.
Video is ideal for capturing action but photos are better for recognition.
Comparison of a
320 x 240 video frame
to 800 x 600 photo.
Digital Photos
Whilst digital photos cannot capture the action, they are very good for
providing evidence for identification of people.
Unlike digital video where each frame or picture must be small in size to
be recorded and stored quickly, because speed is not so important when
storing a photo they can be much larger and contain more pixels and
hence more information.
