Reparing corrupted data in a frame of an image sequence

A process for enhancing a frame of an image sequence, the process comprising dividing the frame into a number of blocks and matching the blocks with corresponding blocks in the directly preceding and directly succeeding frames of the sequence to compensate for object motion between frames. Damaged pixels are identified by comparing their actual intensity values with intensity values predicted by an autoregressive process conducted on the motion compensated data. Once identified, the intensity values of the damaged pixels are replaced by values interpolated by a further autoregressive process modified to ignore the effects of damaged pixels.