Method and apparatus for processing picture signal

Abstract

Abstract PURPOSE:To obtain a picture alike a sand surface by generating the 1st and 2nd random signals, storing temporarily the 2nd random signal and binarycoding an input picture signal through the use of the stored 2nd random signal on a picture screen as a threshold value arranged two-dimensionally. CONSTITUTION:The content of a subtraction circuit 33 is decremented by 1 at each clock pulse transmitted via a gate circuit 1, while the content of a random signal generating circuit 31 is updated. Then a storage device 32 outputs a numeral of a sand surface particle distribution table according to an address re presented by the content of a random signal generating circuit 31. When the content of the subtraction circuit 33 is subtracted into zero, a register 34 is commanded so as to update the content into the information transmitted newly from a random signal generating circuit 31a. The output data of the storage device 32 is fetched to the subtraction circuit 33 at the same time. Further, the content of the random signal generating circuit 31a is outputted to latch circuits 18-21 as a threshold value signal to binarycode a picture signal via the register 34.

Inventors

• 👤 Hiroyoshi Tsuchiya
• 👤 博義 土屋
• 👤 Katsuo Nakazato
• 👤 中里　克雄
• 👤 Kunio Sannomiya
• 👤 三宮　邦夫
• 👤 Hidehiko Kawakami
• 👤 秀彦 川上
• 👤 Hirotaka Otsuka
• 👤 大塚　博隆

Bibliographic Details