digital signal processing

i'm making a project based on micromouse i.e a kind of robot. do u think it is a kind of robot but it is too lengthy as i have to make a maze for it and we have to make it with 8051 microcontroller or any other which is available in the college. do u think that it is a good project for my final year?
i'm more interested in digital signal processing. so i tried to find projects related to it. i like related to the security system i.e the biometric security.
can anyone tell me a project releated to digital signal processing with biometric security
please reply soon i have to register today.

well for dsp are you going hardware or software in matlab. for hardware you will need one of those really expensive kits which interface with matlab. maybe your university can provide you with kits for usage.eloborate your question