Figure 4
PI in a noisy segment. The columns show from left to right: (i) Noisy segment with one frequency band and a patch marked. (ii) Enhanced segment. (iii) The marked frequency band before de-noising and after one to three iterations. (iv) Kernel values between the marked patch and all other noisy patches in the band before de-noising and after one to three iterations. Note that in contrast to Figure 3, other kernel vector entries besides the entry equal to one are larger than zero and therefore contribute to the averaging in PI.