Automated Visual Inspection of Ship Hull Surfaces Using the Wavelet Transform

Pseudocode 1

Pseudocode to implement the developed algorithm.

Step  1. Compute Shannon Entropy: 𝑆^𝑗_𝑆, 𝑆^𝑗_ℎ, 𝑆^𝑗_𝑣 and 𝑆^𝑗_𝑑

Step  2. Compute 𝑅_𝑗=𝑆^𝑗_𝑆/(𝑆^𝑗_𝑆+𝑆^𝑗_ℎ+𝑆^𝑗_𝑣+𝑆^𝑗_𝑑) for 𝑗=1,2,3,…,𝐽

Step  3. Compute optimal decomposition level:

  𝐽^∗=argmax_𝑗{ADR_𝑗}, 𝑗=1,2,3,…,𝐽

Step  4. Compute 𝐹=𝑊⁻¹[𝑓^(𝐽∗)_𝐿𝐿]

Step  5. Compute 𝐹^′=𝑚_𝑘×𝑘[𝐹]

Step  6. Binarize 𝐹^′