Automated Visual Inspection of Ship Hull Surfaces Using the Wavelet Transform

Figure 5

Approximation subimages (𝑓^(𝑗)_LL) of four wavelet decomposition levels for different images ((a) H225, (b) H34, (c) H241, (d) H137, and (e) H10) from portions of ship’s hulls.

(a)

(b)

(c)

(d)

(e)