The paper proposes a novel approach for gray scale images segmentation. It
is based on multiple features extraction from a single feature per image
pixel, namely its intensity value, via a recurrent neural network from the
reservoir computing family - Echo state network. The preliminary tests on
the benchmark gray scale image Lena demonstrated that the newly extracted
features - reservoir equilibrium states - reveal hidden image
characteristics. In present work the developed approach was applied to a
real life task for segmentation of a 3D tomography image of a of bone whose
aim was to explore the object?s internal structure. The achieved results
demonstrated the novel approach allows for clearer revealing the details of
the bone internal structure thus supporting further tomography image
analyses.