kernel density estimation based background subtraction

kernel density estimation based background subtraction algorithm [1] with a command line interface. this algorithm is a developed version of [2]. the kmovingobjdetector class within the project is originally written by birant orten who has graciously allowed me to use his code. i just modified it to suit my purposes. so, if you use any material from this program you should refer both [1] and [2] apart from this web-page. if you compile with __OPENCV__ flag, you'll be able to open avi files. without this flag, you will be able to open just ppm images. the usage.txt explains the input specifications.