Gi0sssry
Optical zoom
This is a general zoom which can enlarge images with a lens and
does not deteriorate quality of images.
Quality
An expression ot the rate of compression used in a digital image,
Higher quality images have a lower rate of compression, which
usually results in a larger file size.
Resolution
The number of pi×els present in a digital image. High resdution
images contain more pixels and typicaJly show more @tail than
low resolution images.
Shutter speed
Shulter speed refers to the amount of time it takes to open and
close the shutter, and it is an importar/t taotor it/the brightness of
a photo, as it controls the amount of light which passes through
the aperture before it reaches the image sensor, A fast shutter
speed allows less time to let light in and the photo becomes
darker and more easily freezes subjects in motion.
Vignetting
A reduction of an image's brightness or saturation at the penphery
(outer edges) compared to the center ot the image, Vignetting
can draw interest to subjects positioned in the center of an
image.
White balance (color balance)
An adjustment ot the intensities of odors (typically the pnrnary
colors red, green, and blue), in an image. The goal of adjustir/g
the white balance, or color babnoe, is to correctly render the
colors in an image.
Appendixes 156
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