A Comparative Study of Contemporary Color Tongue Image Extraction Methods Based on HSI

Figure 9

Result comparisons of 4 kinds of tongue image extraction methods. (a) Light red tongue image. (b) Manual segmentation result of light red tongue. (c) Segmentation result of light red tongue image by geodesic active contour. (d) Extraction result of light red tongue by the method mentioned in [21]. (e) Extraction result of light red tongue by the method mentioned in [22]. (f) Extraction result of light red tongue by our method. (g) Light white tongue image. (h) Manual segmentation result of light white tongue. (i) Segmentation result of light white tongue by geodesic active contour. (j) Extraction result of light white tongue by the method mentioned in [21]. (k) Extraction result of light white tongue by the method mentioned in [22]. (l) Extraction result of light white tongue by our method. (m) Red tongue image. (n) Manual segmentation result of red tongue. (o) Segmentation result of red tongue by geodesic active contour. (p) Extraction result of red tongue by the method mentioned in [21]. (q) Extraction result of red tongue by the method mentioned in [22]. (r) Extraction result of red tongue by our method. (s) Deep red tongue image. (t) Manual segmentation result of deep red tongue. (u) Segmentation result of deep red tongue by geodesic active contour. (v) Extraction result of deep red tongue by the method mentioned in [21]. (w) Extraction result of deep red tongue by the method mentioned in [22]. (x) Extraction result of deep red tongue by our method. (y) Purple tongue image. (z) Manual segmentation result of purple tongue. (aa) Segmentation result of purple tongue by geodesic active contour. (bb) Extraction result of purple tongue by the method mentioned in [21]. (cc) Extraction result of purple tongue by the method mentioned in [22]. (dd) Extraction result of purple tongue by our method. (ee) Tongue image with thick white coating. (ff) Manual segmentation result of tongue with thick white coating. (gg) Segmentation result of tongue with thick white coating by geodesic active contour. (hh) Extraction result of tongue with thick white coating by the method mentioned in [21]. (ii) Extraction result of tongue with thick white coating by the method mentioned in [22]. (jj) Extraction result of tongue with thick white coating by our method. (kk) Tongue image with thick yellow coating. (ll) Manual segmentation result of tongue with thick yellow coating. (mm) Segmentation result of tongue with thick yellow coating by geodesic active contour. (nn) Extraction result of tongue with thick yellow coating by the method mentioned in [21]. (oo) Extraction result of tongue with thick yellow coating by the method mentioned in [22]. (pp) Extraction result of tongue with thick yellow coating by our method.