Design of AMBA-compliant image scaler circuit for low bus bandwidth

摘要

This paper proposes the design of Advanced Microcontroller Bus Architecture (AMBA)-compliant image scaler circuit for vision-based object detection. In order to avoid the redundant memory access and reduce the bus bandwidth, the proposed circuit accesses the external memory only once to read each original image frame. The circuit size is reduced by sharing the operations of bilinear interpolation to generate the resized images. Since the proposed circuit generates nine resized images with different levels of resolution from each 640×480 image frame in real time, it can be used for real-time object detection. Furthermore, it can be easily interconnected with other IPs conforming AMBA 3.0 protocol.