Interleaved pipeline structures for two-dimensional recursive filtering

Parallel and pipeline structures for real-time 2D recursive filtering are presented. For general scalar 2D recursive filters, a 2D multiple-interleaved pipeline architecture is introduced that is compatible with the nature of the image-scanning scheme. Using this structure, the sampling period can be a fraction of the time needed for one scalar addition operation and the delay is only a few samples. In addition, this structure does not require any I/O buffers for real-time implementation