Interference No. 103,587
father printouts which he screened using several implementations of his idea. This concept was
referred to as Dot 2.
The earliest written description of the invention is a program called WAVY.BAS. In
1996, a printout of WAVY.BAS was made and that printout is identified as LX-10. The
program includes the date “11-12-87.” Levien produced screened images using the program of
LX-10 on the same day as it was written, November 12, 1987. The early wavy line
(WAVY.BAS) version of Dot 2 and a later serpentine scan version used prior outputs in
combination with a hysteresis constant to control the size of adjacent pluralities of dots forming a
larger variable size dot.
An adaption of the program in LX-10 in C language is illustrated in LX-14. The program
of LX-14 is the equivalent of the program of LX-10, which is written in BASIC. Raphael used
the program of LX-14 to produce the screen of LX-13, which shows long strings of connected
dots which form wavy lines. Smaller groups of dots form dot shapes in the highlight and dark
regions of the gray scale. An actual image (LX-12) was screened using the wavy line version of
Dot 2.
Raphael Levien’s work to implement the idea for Dot 2 involved a series of experiments
in which test patterns of dots were produced. After this work, Levien labored to produce
screened full images. Subsequent to November 8, 1987, the printing of screened images
occurred throughout the rest of that month. The earliest printout using Dot 2 that was saved is
from a picture Raphael Levien took at his brother Alex’s sixteenth birthday celebration on
November 30, 1987 (LX-9). A picture was taken using the digital camera, and it was screened
that day using the serpentine scan version of Dot 2. A 250% enlargement of the picture (LX-15)
shows black dots clustered into pluralities of dots forming variable size black dots. In the dark
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