The contour expansion operation is robust to the selected threshold value.

Abstract

<p>The contour expansion was performed with the initial contours obtained with threshold value of 45 (A) and 65 (B). The final converged contours are close to each other, as shown in (C), which implies that the contour expansion operation is robust with respect to the selection of threshold value. (D) The enlarged image for the selected area in (C).</p