digital still camera
A camera incorporating an image sensor which outputs a digital signal
(DSC)
representing a still picture, or records a digital signal representing a still picture
on a removable medium, such as a memory card or magnetic disk.
dynamic range
The ratio of the maximum luminance level that appears unclipped to the
minimum luminance level that can be reproduced with an incremental signal to
temporal noise ratio of at least 1, as determined according to ISO 15739.
Exif/JPEG
A compressed file format for digital cameras in which the images are
compressed using the baseline JPEG standard, described in ISO 12234-2, and
metadata and thumbnail images are stored using TIFF tags within an application
segment at the beginning of the JPEG file.
exposure index
A numerical value that is inversely proportional to the exposure provided to an
image sensor to obtain an image. Images obtained from a camera using a range
of exposure index values will normally provide a range of image quality levels.
file system
The software structure which specifies how the data are logically organized on a
given storage medium.
folder
An optional sub-structure in a hierarchical storage area that can contain data
objects.
ISO speed
A numerical value calculated from the exposure provided at the focal plane of an
electronic camera to produce specified camera output signal characteristics
using the methods described in the referenced standard. The ISO speed should
correlate with the highest exposure index value that provides peak image quality
for normal scenes.
JPEG
Joint Photographic Experts Group. An image compression method defined in
ISO/IEC 10918-1.
memory card
A specific type of memory module with a physical form factor approximating that
of a credit card in outline; approx. 85 mm x 55 mm.
PC
Personal Computer. Any personal computing device, which may employ various
hardware architectures and operating systems.
protocol
Defined mechanisms for exchanging data between devices.
StorageID
A device-specific four byte unsigned integer (UINT32) that represents a unique
storage area that may contain data objects. The most significant sixteen bits of a
StorageID represents the PhysicalStorageID, while the least significant sixteen
bits of a StorageID represents the LogicalStorageID.
USB
Universal serial bus, a digital interface for connecting up to 64 devices in a
tiered-star topology.
See http://www.usb.org.
white balance
The adjustment of electronic still picture color channel gains or image processing
so that radiation with relative spectral power distribution equal to that of the
scene illumination source is rendered as a visual neutral.
Source: ISO/WE 12231 Photography– Electronic still-picture cameras –Terminology
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