G–4
Pagis Pro User’s Guide
Contents
Index
G
grayscale—A method of storing each pixel of an image as more
than one bit of data. For example, four-bit grayscale data stores
each pixel of an image as four bits of data. This enables a finer
representation of the original data than simple binary (black and
white, or one-bit) data.
H
halftone—An image composed of differently sized black dots
spaced in such a way as to simulate the different gray tones of an
original photograph or color drawing.
handles—Solid square objects typically in the four corners of a
rectangle in a drawing package or other application that enable
resizing of the rectangle.
hypertext—A capability to navigate a text data base (an on-line
Help system, for example) in a number of different ways: by
selecting a subject from a topic list; by stepping sequentially
forward and backward; by keyword search; by context (that is,
clicking on a word in text to get its definition or another screen of
information about it). Pagis Pro uses the Microsoft Windows Help
tools to provide a hypertext-based Help system directly accessible
from within the application.
I
ISIS—Acronym for Image and Scanner Interface Standard
developed by Pixel Translations, Inc. ISIS is an applications
programmers interface (API) for the design and development of
scanner drivers. Pixel Translations and other scanner vendors
use ISIS to develop scanner drivers. Pagis Pro supports most of
the ISIS-compatible scanners available on the market today. See
also TWAIN.