High-speed digital image processing apparatus

Abstract From the Canadian patent

An image processing apparatus is provided which is capable of real time image processing especially, filtering, without generating a delay in the frame memory. A cascade filtering circuit filters digital video signals obtained by digitally converting analog video signals to obtain a time sequential digital pixel data stream for the filtering operation based on a pattern of predetermined constants of p-rows and q-columns. The cascade filtering circuit using p basic filter circuits cascade-connected with each other. Each basic filter circuit carries out the filtering for one-row and q columns of pixel data. Each basic filter circuit includes delay circuits multipliers, and adders. Interlace …