Method and apparatus for processing picture signal

Abstract

Abstract PURPOSE:To obtain a picture alike a sand surface by changing the 2nd random signal in the timing represented by a numeral in a sand surface particle distribution table selected sequentially in response to the value of the 1st random signal and binary-coding an input picture signal through the use of the value of the 2nd random signal as a threshold value arranged two-dimentionally on a picture screen. 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 the sand surface particle distrubution table according to the address respresented by the content of the random signal generating circuit 31. Further, when the content of the subtraction circuit 33 reaches 0 as the result of subtraction , a random signal generating circuit 34 is commanded to be updatd for the content. Further, the output data of the storage device 32 is fetched by the subtraction circuit 2 at the same time. Then the content of the random signal generating circuit 34 is outputted to latch circuits 18, 21 as the threshold value signal to binary-code the picture signal.

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