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.

 

 

 

The ratio of the maximum luminance level that appears unclipped to the

dynamic range

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.

 

 

 

A compressed file format for digital cameras in which the images are

Exif/JPEG

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.

 

 

 

A numerical value that is inversely proportional to the exposure provided to an

exposure index

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.

 

 

 

 

A numerical value calculated from the exposure provided at the focal plane of an

 

electronic camera to produce specified camera output signal characteristics

ISO speed

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.

 

 

 

A device-specific four byte unsigned integer (UINT32) that represents a unique

StorageID

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.

 

 

 

Universal serial bus, a digital interface for connecting up to 64 devices in a

USB

tiered-star topology.

 

See http://www.usb.org.

 

 

 

The adjustment of electronic still picture color channel gains or image processing

white balance

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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