1. A computer implemented method for identifying and quantifying sonar targets within a liquid medium, the method comprising the steps of: collecting a raw sidescan sonar image; separating a region of interest related to the sonar targets from the image; performing an image transformation on the image using an extraction algorithm; performing particle analysis on the extracted region of interest to generate a feature vector related to sonar targets; and presenting the generated feature vector to a neural network to classify the image with respect to the sonar targets of interest.