86
Explanation of Terms
Deactivated batteries:
Leaving an Ni-MH battery unused in storage for a long period may cause a rise in the level of substances that
inhibit current flow inside the battery and result in a dormant battery. A battery in this state is referred to as
deactivated.
Because current flow is inhibited in a deactivated Ni-MH battery, the battery’s original level of performance cannot
be achieved.
DPOF:
Digital Print Order Format
DPOF is a format used for recording information on a storage media (image memory card, etc.) that allows you to
specify which of the frames shot using a digital camera are to be printed and how many prints are made of each
image.
EV:
A number that denotes Exposure Value. The EV is determined by the brightness of the subject and sensitivity
(speed) of the film or CCD. The number is larger for bright subjects and smaller for dark subjects. As the brightness
of the subject changes, a digital camera maintains the amount of light hitting the CCD at a constant level by
adjusting the aperture and shutter speed.
When the amount of light striking the CCD doubles, the EV increases by 1. Likewise, when the light is halved, the
EV decreases by 1.
Frame rate (fps):
The frame rate refers to the number of images (frames) that are photographed or played back per second. For
example, when 10 frames are continuously photographed in a 1-second interval, the frame rate is expressed as 10 fps.
For reference, TV images are displayed at 30 fps.
JPEG:
Joint Photographics Experts Group
A file format used for compressing and saving color images. The higher the compression rate, the greater the loss
of quality in the decompressed (restored) image.
Memory effect:
If an Ni-MH battery is repeatedly charged without first being fully discharged, its performance may drop below its
original level. This is referred to as the “memory effect”.
Motion JPEG:
A type of AVI (Audio Video Interleave) file format that handles images and sound as a single file. Images in the file
are recorded in JPEG format. Motion JPEG can be played back by QuickTime 3.0 or later.
PC Card:
A generic term for cards that meet the PC Card Standard.
PC Card Standard:
A standard for PC cards determined by the PCMCIA.
PCMCIA:
Personal Computer Memory Card International Association (US).
White Balance:
Whatever the kind of the light, the human eye adapts to it so that a white object still looks white. On the other hand,
devices such as digital cameras see a white subject as white by first adjusting the color balance to suit the color of
the ambient light around the subject. This adjustment is called matching the white balance.
Exif Print Format is a newly revised digital camera file format that contains a variety of shooting information for
optimal printing.
