1
Takashi Sakamoto, Akira Itooka: Linear interpolator for color correction. Lackenbach Lilling & Siegel, June 23, 1981: US04275413 (217 worldwide citation)

A linear interpolating method and apparatus for color signals in a memory of a picture reproducing machine, wherein the stored signals are addressed in a three-dimensional fashion and a cubic interpolation unit in the memory is dissected into tetrahedra. It is determined which of these tetrahedra co ...


2
Takashi Sakamoto: Method of color correction. Dainippon Screen Seizo Kabushiki Kaisha, Holman & Stern, November 29, 1977: US04060829 (60 worldwide citation)

A method of color correction of the particular application to a color scanner having a color correction circuit, an analog-digital converter and a memory. Color separation signals obtained by scanning a color original are first compressed to the color ranges reproducible by printing inks by the colo ...


3
Takashi Sakamoto: Linear interpolating method and color conversion apparatus using this method. Dainippon Screen Seizo Kabushiki Kaisha, Yuter Rosen & Dainow, April 16, 1985: US04511989 (59 worldwide citation)

A linear interpolating method and apparatus for signals in a memory wherein first signals are converted into second signals by addressing in at least four-dimensional fashion, for use in a color picture processing machine such as a color scanner, a color facsimile, a color T.V. monitor, and other si ...


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Osamu Kitagawa, Takashi Sakamoto: Method of and apparatus for recording halftone images and halftone images produced thereby. Dainippon Screen MFG, Lowe Price Leblanc and Becker, October 8, 1991: US05055923 (41 worldwide citation)

A printed image (I.sub.t4) is produced with halftone images for respective color printers while so-called rosette moire and a color shift from an original iamge are prevented. Halftone dots (H.sub.m4, H.sub.c4, H.sub.k4) are formed in linear shapes extending in respective prescribed directions, ther ...


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Katsuhiko Furusawa, Makoto Hirosawa, Takashi Sakamoto: Method of and apparatus for image smoothing along a tangential direction of a contour. Dainippon Screen MFG, Lowe Price LeBlanc and Becker, September 17, 1991: US05050227 (41 worldwide citation)

Smoothing in a tangential direction of a contour and detail enhancement in its perpendicular direction are simultaneously achieved with spatial filters having prescribed weighing factor distribution. An area including a contour is first designated, and a direction of the contour is detected. A weigh ...


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Takashi Sakamoto, Tetsuo Sano, Eiji Kodama, Masamichi Choh: Method of tracing/recording image lines and apparatus therefor. Dainippon Screen MFG, Brumbaugh Graves Donohue & Raymond, December 24, 1985: US04561061 (38 worldwide citation)

An apparatus for tracing and recording image lines includes a coordinate reader which detects coordinate values of an image to be traced; an image sensor which is movable in a plane relative to a table; a memory in which image signals detected by means of the sensor are written; and a central proces ...


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Taiji Yamada, Takashi Sakamoto: Methyl Methacrylate resin composition. Sumitomo Chemical Company, Pillsbury Winthrop, June 26, 2001: US06252002 (29 worldwide citation)

The present invention provides a methyl methacrylate resin composition including (A) about 90 to 99% by weight of a methyl methacrylate polymer with a branched structure having a weight average molecular weight of about 80,000 to 400,000 and a molecular weight between branch points, defined by using ...


9
Takashi Sakamoto: Method and machine for reproducing a color picture by storing signal streams, one entirely, and the rest partially. Dainippon Screen Seizo Kabushiki Kaisha, Daniel M Rosen, May 26, 1981: US04270141 (29 worldwide citation)

A method and machine for reproducing a picture are disclosed, in which a color original picture is scanned and the analog original picture signal thereby produced is broken into n separation picture signals, which are then digitalized. One of these separation picture signals is then stored in its en ...


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Makoto Hirosawa, Shinji Asada, Takashi Sakamoto: Method of enhancing image sharpness for image reproduction using sharp/unsharp signal processing. Dainippon Screen MFG, Ostrolenk Faber Gerb & Soffen, November 20, 1990: US04972256 (27 worldwide citation)

An original image is read with an image reader for each pixel, whereby color component signals (Yi, Mi, Ci, Ki) expressing the original image are obtained. A sharp signal generator extracts the gray component from the combination of the color component signals, to output the gray component as a shar ...