How do i use the software in the dvsdk_4_01 to capture pictures ?

Hi, all.
i am a newer in bbxm rev c. i have use angstrom OS in my plate. And the dvsdk_4_01 has installed in my host machine which runs ubuntu OS. but next i do not know what i should do. i want to achieve some functionalities like video tracking. i know the codec engine mechanism and also want to use the DSP core. so could someone tell me what i should do next.

thanks a lot.