Pattern generator

Abstract

Abstract PURPOSE:To obtain a shadowed pattern within a short period by synthesizing an original image signal and an original shadow signal to obtain a shadowed image signal. CONSTITUTION:Original shadow signals obtained from two delay blocks 13, 14 are applied to an OR gate 15 and a synthesized shadow signal based on OR operation is outputted. Which signal, the original image signal, or the original shadow signal, is to be displayed is decided by a deciding means 16 when both signals are overlapped. When the original image signal is logic '0' and the synthesized shadow signal is logic '1', a shadow color (black) is outputted, and when both the original image signal and synthesized shadow signal are '0', a video signal of a background color (blue) is outputted. The original image can be observed so as to be superposed to the shadow image by the operation of the deciding means. An output device 17 displays the image by applying the output of the deciding circuit as a video signal.

Inventors

• 👤 Tsuneo Takahashi
• 👤 恒雄 高橋

Bibliographic Details