Appeal No. 1999-2058
Application 08/433,643
having a grey level value represented by numbers ranging
between 0 (black) and 255 (white). Upper and lower thresholds
define a "window" whose range determines the grey levels which
are taken into account during processing. The lower and upper
thresholds are set by two sets of binary switches on the
computer console (p. 26), which correspond to the "image
density lower limit setting means" and the "image density
upper limit setting means." The pixels which exhibit grey
levels specified by the window are assigned a predetermined
intensity by the program, such as white (255), while other
pixels are set to black (0) (p. 25). The intensities are
displayed as dots on a storage scope (p. 26), which
corresponds to the claimed "display means." It is noted,
however, that the claim limitations of "for forming images on
display means" (preamble), "for specifying image areas . . .
from among the images displayed on the display screen," and
"so that the image area can be displayed on the display means
with predetermined density" (end of claim 1) are statements of
intended use and do not require actual display.
Maayan specifies image areas having a density defined by
the window (between the upper and lower image density limits)
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