a digital file. By making these adjustments before
scanning an image, you can save time and file size.
Scanners are produced by a number of manufacturers.
Scanners used in Navy imaging facilities are produced
by Nikon and Kodak (fig. 3-7).
an interface. Because of the enormous amount of data
involved in electronic imaging, information is passed
through a SCSI.
permits a number of peripheral devices to be connected
to the computer through a single SCSI port. This is
accomplished by chaining the devices together with a
SCSI cable. The last device in the chain must have a
special adapter, known as a terminator. Some devices
have built-in terminators.
connected, you must verify that none of the peripherals
have the same identification number. These
identification numbers may be changed by using either
dipswitch settings or software.
once it is in the computer. The second program is a
driver that acts as a translator between the scanner and
the paint program. Once the image is digitized,
to the image.
storage space is required. It is common for a 24-bit
color image to require 20 to 25 megabytes of storage.
computer platforms in use for digital photography--the
Apple Macintosh, PCs (IBM or compatibles), and
Unix-based machines. The most popular computer for
and IBM compatibles are also used for digital imaging.
They are becoming more popular in the digital-imaging
marketplace. Unix-based workstations are used for
science-oriented operations and high-volume
publishing of books and technical manuals. Therefore,
Specific computer systems are not covered in this
32Mb of RAM. Storage may also become a problem
because of the large-size file of color digital images. A
high-resolution scanned image can require 250
megabytes or more of memory. A hard drive in excess
of 600Mb is not uncommon for an electronic-imaging
peripherals, such as scanners, film recorders, and
printers. A number of interface cards are available for
both Macintosh and PCs that convert analog images to
images. Computer software (programs) makes it
possible for you to communicate with the hardware.
Advanced Photography Course