Abstract:

With the growing requirement of moving object capture in embedded systems, it is hard to tradeoff the conflict requirements of resolution and capture speed. The proposed method splits motion capture process into motion detection and target capture, which have different emphases on resolution and speed. Using an active-pixel architecture, CMOS image sensor’s hardware characteristics can randomly access the sensor’s image buffer to achieve the switch between working modes of varying trait on the digital signal processing （DSP） platform. Thus, both capture speed and resolution can be guaranteed. With the proposed method, ordinary chips can achieve better performances, which otherwise would require higher performance chips.

Key words: motion capture; embedded system; active pixel architecture CMOS image sensor; random access; digital signal processing （DSP）