I have installed wheezy on 8gb sd card, but it says 5.5gb is unallocated and when i tried to install opencv and prerequired packages, RP gives no space left error. I check the free space on it, that was terrible : 55mb free space over 1.5gb .
Anyway, is there a way to use the other 5.5gb ? How can i merge that partitions ? If i cannot, do you know a image for 8gb sd ?