interconnecting the various components that make up
the imaging system. The technology in each
component area is developing at a rapid rate. With the
ever-increasing number of hardware components and
software packages available on the market, setting up
the links between the devices can become frustrating.
Before choosing new components for a system, you
must look carefully at each piece of new equipment to
be sure it is compatible with the existing system.
or still-video cameras, or you can scan and digitize
existing film and paper images.
must be converted to digital values. Images that are
imported from a still-video camera are in analog
waveform. An analog waveform is a value that varies
continuously over time (fig. 3-4). For an analog
the time must be changed into noncontinuous, numeric
values of ones and zeros (fig. 3-5). The process used to
determine time is called sampling. Sampling is done at
equal increments of time. Conversion of continuous
values into distinct values is called QUANTITIZING.
The combined process is called analog-to-digital
conversion (A/D conversion) or DIGITIZING.
representation of the signal results. When the sampling
rate is high, virtually an exact copy of the original signal
green, and blue information is handled as three separate
sets of data to produce three sets of digital information.
is done simultaneously.
resolution of the display system is low, the individual
is called pixelation.
electronic-imaging workstation instantly. The features
on these cameras are basically the same, and they are
used in the same manner as conventional cameras. The
depending on the camera.
manual, depending on the camera.
(CCD), is the main component of an electronic camera.
the CCD, the more pixels it can record, thus the higher
the resolution. However, the resolution quality and the
exposure range of an electronic camera is not as great
Advanced Photography Course