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An experimental high pressurized ink-jet device is described for reproducing gray level pictures by the pulse-width modulation of picture signals. A reproduced picture with the resolution of about two lines/mm, and seven gray level is obtained for a facsimile test chart which is scanned with the scanning density of five lines/mm, and also a good reproduced picture is obtained for a halftone dot picture.
Shin KIMURA Takeshi AGUI Noriyuki HOSHINA
A label is given to each vertex of three views of a solid object. The relations among three dimentional vertices are obtained from a labeled tree. A face extracting algorithm by the tree searching method is reported with an example.