FPGA implementation of 2-D wave digital filters for real time motion feature extraction

Many n-D signal processing applications in industrial environments require real-time processing of data. We propose a technique for realization of motion feature extraction in video images on low performance computing hardware. The realization is based on a 2-D spatio-temporal wave digital filter (WDF) using SDRAM-based shift operators. This enables the usage of different effective shared bus widths for the connection between a DDR2-SDRAM and the WDF arithmetic subsystems, which is demonstrated by two different configurations. The FPGA board is processing real-time video signals from an image sensor and the filtered output can be observed on a display.