1. A method of image processing, the method comprising: (i) selecting, via a processor, a one dimensional slice from an image represented by image data from an image sensor; (ii) computing, via the processor, a wavelet scalogram of the slice; (iii) identifying, via the processor, ridge features within the wavelet scalogram; repeating steps (i), (ii) and (iii) for one or more further slices; superimposing, via the processor, the identified ridge features from the slices; and deriving, via the processor, textural information from said superimposed identified ridge features.