Appeal No. 1999-2058
Application 08/433,643
pixels outside the window range of densities to another
predetermined density, black, is not precluded by claim 1.
Moreover, it is noted that Appellants' invention changes
pixels values outside the window defined by the two thresholds
to a predetermined value as shown in Fig. 9. The window
thresholds in Maayan can be changed continuously (p. 26) to
define various structures: (1) the thresholds for Fig. 2 were
chosen "so as to depict the cytoplasma" (p. 26); (2) "[b]y
shifting the window values upward only nuclei may be depicted
(Fig. 3" (p. 27); and (3) "Figure 4 depicts the scenery which
is viewed through a narrow window in the cytoplasma grey level
range which outlines the epithelial border" (p. 27). Thus,
Maayan's grey window is used to specify particular images from
among displayed images. However, we note that the function of
"specifying image areas . . . from among the images displayed
on the display means" in claim 1 only requires determining
areas having a density between upper and lower limit values;
it does not require specifying particular images.
Appellants argue that Poulsen does not teach the claimed
"image area specifying means" because it does not teach or
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