公开(公告)号：DE3329906C2

公开(公告)日：1988-11-10

申请号：DE3329906

申请日：1983-08-18

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP ,  MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC., TOKIO/TOKYO, JP

Inventor： NAKAZATO, KATSUO, TOKIO/TOKYO, JP ,  SANNOMIYA, KUNIO, ATSUGI, KANAGAWA, JP ,  KAWAKAMI, HIDEHIKO, MACHIDA, TOKIO/TOKYO, JP ,  TSUCHIYA, HIROYOSHI ,  OTSUKA, HIROTAKA, KAWASAKI, KANAGAWA, JP ,  UCHIDA, HIDEO, TOKIO/TOKYO, JP

IPC: H04N1/00 ,  H04N1/393 ,  H04N1/407 ,  H04N1/409

Abstract: An image processor for reproducing a continuous tone image such as a photograph in a black-and-white binary dot image (halftone image) has a linear correction section for converting a sampled digital image signal in a predetermined manner controlled by black and white densities of an original, thereby performing linear conversion between the continuous tone image and the halftone image. The image processor also has another correction section for performing profile emphasis to obtain a clear halftone image.

公开(公告)号：DE3236140C2

公开(公告)日：1987-06-19

申请号：DE3236140

申请日：1982-09-29

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP ,  MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC., TOKIO/TOKYO, JP

Inventor： OTSUKA, HIROTAKA, KAWASAKI, JP ,  UCHIDA, HIDEO, TOKIO/TOKYO, JP ,  UNO, YOSHIHIRO, MACHIDA, TOKIO/TOKYO, JP ,  NAKAZATO, KATSUO, TOKIO/TOKYO, JP ,  SANNOMIYA, KUNIO, ATSUGI, KANAGAWA, JP ,  KAWAKAMI, HIDEHIKO, MACHIDA, TOKIO/TOKYO, JP ,  TSUCHIYA, HIROYOSHI, KAWASAKI, JP

IPC: H04N1/04 ,  H04N1/40

公开(公告)号：DE2704772B2

公开(公告)日：1981-01-22

申请号：DE2704772

申请日：1977-02-04

Applicant: FUJITSU LTD., KAWASAKI, KANAGAWA ,  MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC., TOKIO

Inventor： IIZUKA, YOSHIO, SAGAMIHARA, KANAGAWA (JAPAN)

IPC: H04B1/66 ,  H04N1/17 ,  H04N1/40 ,  H04N1/411 ,  H04N1/415 ,  H04N19/50 ,  H04N1/41

Abstract: A facsimile communication system for compressing, transmitting and reproducing facsimile information is provided, wherein a transmitter includes a correlation detector. When a first facsimile information scanned along a first scanning line has a low pattern density, the correlation detector determines by discrimination that at least one successive facsimile information, for example a second facsimile information scanned along a second scanning line adjacent to the first scanning line, should be abridged. Then, the transmitter compresses the first facsimile information and a third facsimile information contained in a third scanning line, and the compressed first and third facsimile informations are transmitted to a remote receiver. The remote receiver also includes a correlation detector and the correlation detector determines by discrimination that the compression-demodulated first facsimile information has a low pattern density. Then, the remote receiver supplies the first facsimile information to a recording device when it scans a first scanning line and further, repeated first facsimile information is supplied to at least one successive scanning line, for example, to a second scanning line. Thereafter, the compression-demodulated third facsimile information is supplied to the recording device when it scans a third scanning line.

公开(公告)号：DE3343006C2

公开(公告)日：1985-12-12

申请号：DE3343006

申请日：1983-11-28

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP ,  MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC., TOKIO/TOKYO, JP

Inventor： OTSUKA, HIROTAKA, KAWASAKI, JP ,  NAKAZATO, KATSUO, TOKIO/TOKYO, JP ,  SANNOMIYA, KUNIO, ATSUGI, KANAGAWA, JP ,  KAWAKAMI, HIDEHIKO, MACHIDA, TOKIO/TOKYO, JP ,  TSUCHIYA, HIROYOSHI, KAWASAKI, JP ,  UCHIDA, HIDEO, TOKIO/TOKYO, JP

IPC: H04N1/405 ,  H04N1/40 ,  H04N1/38