A study on tongue image color description based on label distribution learning

In the process of auxiliary tongue diagnosis, the color of a tongue is always labeled by a single-label. In fact, the tongue color is changeable. It is difficult to give an accurate description to the diversified tongue color for single-label learning. So in this paper, we intend to give a new group of labels to a tongue image by the Label Distribution Leaning (LDL). The value of each label is its description degree of the tongue image color. Experimental results show that a more accurate and complete description to a tongue image is given by LDL, which is beneficial to the further development of auxiliary diagnosis based on tongue color in Traditional Chinese Medicine.