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Figure 3. (a) The absolute match error of the method based on the maximal alignment of the centre-line plotted against the relative location of a polyp along the centre-line in supine position. The 0 on the x-axis corresponds to caecum and 1 to rectum. (b) The absolute match error of the NDAC method plotted against the relative location of a polyp along the centre-line in supine position. The 0 on the x-axis corresponds to caecum and 1 to rectum. The three circled arrows indicate polyps from three different patients with a relatively large absolute match error.
