error install ros grovy in raspbian

edit

thanks for the answer but the link don't work
however i tried to use the image which there is in the installation page and after some modifications it's work. Now i must use opencv for video capure but a correct program that works in my pc with ros fuerte don't compile, i don't know but in my pc there is the package opencv2 while there isn't in this image, maybe it's the problem?
P.S. i add in the cmakefile.txt:

find_package(OpenCV REQUIRED)
target_link_libraries(my_application_target ${OpenCV_LIBS})