Matsushita Electric Industrial Co., Ltd.

Matsushita Graphic Communication Systems, Inc.

Yoshihiro Uno

Kunio Sannomiya

Hiroaki Kotera

Kunio Yoshida

Hiroyoshi Tsuchiya

Hidehiko Kawakami

Akiyoshi Tanaka

Katsuo Nakazato

Hideo Uchida

Hirotaka Otsuka

Hiroaki Miwa

In a variable density scanner a light beam of a fixed spot size is scanned on an original along each of a plurality of parallel line paths at a constant speed to generate a video signal and successively shifted to the next line path. The video signal is sampled to generate a video sample. Each of the line paths is divided into a plurality of line segments so that each segment derives a plurality of video samples and the line paths are formed into a plurality of groups of adjacent line paths so that the video samples are derived from a plurality of patterns of rows and columns. The total value of the video samples of each pattern is arithmetically divided by their number in response to the control signal to derive an average value.

Variable density scanner

In a band compression method using an adaptive prediction system preferably applicable to facsimile transmission, a method of selecting picture elements to be referred (hereinafter defined as reference picture elements) for predicting an information value of a picture element wherein the reference picture elements are not selected uniformly and continuously from the neighborhood of the predicted picture element, but a group of picture elements (the first order picture elements) adjacent to the predicted picture element and further a group of picture elements of equal or higher order than the third order are selected as reference picture elements by excluding those shaded picture elements which lie on lines connecting the predicted picture element and the first order picture elements.

Method of band compression

A charge storage target of cathode ray electron devices comprises a conductive layer and a resistive layer having a common interface therewith, and an insulative layer. At least one of the layers has perforations so that only the resistive and insulative layers are exposed to electron impingement. The perforations define a plurality of elemental regions on which elemental electron image is stored. The resistive regions that cover the underlying conductive layer serve as buffer areas for the entering electrons of which the magnitude is proportional to the amount of charges deposited on the exposed insulative regions, and transfer the stored energy to the underlying layer.

Image storage target and image pick-up and storage tube

A color filter strip arrangement for a color television camera tube which produces luminance and chrominance signals, and in which the chrominance signals are separeted from each other by phase division. A biasing light source is provided for illuminating the color filter to provide a minimum light level against a black frame at the periphery of the filter in order to enable discrimination of chrominance components when the scene being televised is at an extremely low light level. In another embodiment the strip arrangement involves combinations of first and second colors, and has a strip of the first color, a strip of the second color and a black strip. These combinations of strips are, in turn, separated by transparent strips.

Color image pick-up system using strip filter

Growing community of inventors

Machida, Japan

Yoshihiro Uno