Detection via Side Scan Sonar

The images below indicate the difficulty of the detection problem, as the background is non-stationary and the shape and orientation of the mine and its shadow vary a lot.

Physical description of the detection problem

Preprocessing and Detection

Wavelet Denoising approach

Effect of Image Denoising


 Original image (top), wavelet denoised image (center), and Gaussian filtered image (bottom). Mine-like objects in the original image have been enclosed in white squares.

Side Scan Sonar Data

The following images represent the difficulty of the recognition problem. The title includes the coordinates of the mine location (x is the first coordinate).

si000206 (Easy - 427,143; 860,351) si007225 (Difficult - 360,227)
si005134 (Difficult - 771,136) si001104 (Very Difficult - 307,254)

The three difficult images including a brief description, can be downloaded in MATLAB format (2MB).