Epson ES-800C, Руководство пользователя

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Scanner Functions
Various image processing functions are built into your scanner.
They are briefly described in Chapter 3. This Appendix
contains fuller, more technical, information. All functions must
be controlled from the scanner software, and most functions
can be combined with others to produce a variety of effects.
Note:
Because all functions must be controlled from scanner software, not
all the scanner functions may be available, or the range
of
the settings
may be limited. The software may perform unique processes on the
image data and the results can be different from those described in this
manual. When using application software, see its documentation for
details.
How the scanner works
The image is divided into a two-dimensional matrix of tiny
elements. Each dot is called a pixel, or picture element. The
sensor on the carriage scans a line of pixels, and as the carriage
moves, the succeeding lines of pixels are scanned.
The values of the electrical current for pixels are then processed
and converted into binary data that can be used by computer
devices.
Images such as photographs contain various, almost infinite,
tones between black and white as well as various colors. These
are detected as varied intensities of reflection. In monochrome
reading, the scanner converts the intensities into the tonal data
for each pixel. In color reading, the scanner separates the
various colors into three primary colors, green, red and blue,
and converts the tones of these colors for each pixel. By this
method, the scanner can read any colors within the image.
A-2 Appendix