In the 1980 and early in 1990s,
the market shifted to image processing hardware in the form of single boards
designed to be compatible with industry standard buses and to fit into
engineering workstations cabinets and personal computers.
With reference to sensing, two
elements are required to acquire digital images. The first physical device that is sensitive to the energy radiated by
the object we wish to image. The second is the digitizer is a device for converting the output of physical sensing
device into digital form.
Digital storage for image
processing application falls into three principal categories: (1) short term storage for use during
processing, (2) on-line storage for relatively fast recall and, (3) archival
storage, characterized by infrequent access. Storage is measured in bytes,
Kbytes, Mbytes, Gbytes, and Tbytes.
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