Board selection for object tracking for 3x720p cameras.

Hi all,

I need to choose a board which ı will drive 3 different 720p cameras. I will first implement image processing(object tracking or any operation) on images and then rescale the 3 images on a full screen. How should I select the board ?. Which specifications should I need to worry about?. And what board do you suggest ?

Btw, this cameras uses SMPTE 296M encoding standard( embedded synch.) and YUV 4:2:2 pixel format. Do ı need to convert the YUV 4:2:2 format to RGB to operate the image processing or without convertion directly working on YUV 4:2:2 format and then convert to RGB?.

Thank you for your interest.