HP T500 User Manual download pdf (Page 8)

Photography Terms and Denitions

Terms Denitions

Auto Focus (AF)

Auto focus refers to a camera lens’ ability to adjust its conguration in

order to focus properly on a subject regardless of whether it is near or

far from the camera. Auto focus lenses generally provide vastly superior

image quality than do their xed focus cousins since they do not have to

rely on their depth of eld. Also known as: “AF”, “auto-focus”.

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.

Auto White Balance

(AWB)

With auto white balance, the camera attempts to determine the

color temperature of the light and automatically adjust for that color

temperature. Many people just leave the camera set to auto white

balance all the time.

Digital Print Order

Format (DPOF)

A standardized ASCII le created in a digital camera and stored on

removable media along with the image les that indicate how many

copies of which images should be printed. It also allows index prints,

cropping, and text overlays to be specied.

Exif/JPEG

A compressed le 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 le.

JPEG

Joint Photographic Experts Group. An image compression method

dened in ISO/IEC 10918-1.

Exposure Value

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.

ISO Speed

A numerical value calculated from the exposure provided at the focal

plane of an electronic camera to produce specied 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.

USB

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

in a tiered-star topology. See http://www.usb.org.

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