Comparisons of our different projection methods with previous five ones. To segment a squirrel image, an ultrasound baby image, a leaf image, and a synthetic noise number image. (a, h, o, v) Original image with initial green contour. (b, i, p, w) Results by GDEWRM. (c, j, q, w) Results by GDEWORM. (d, k, i, y) Results by ALM. (e, l, s, z) Results by PLM. (f, m, t, I) Results by CALM. (g, n, u, II) Results by our projection methods (from top to bottom is SBPM, ALPM, DSBPM, and DALPM, respectively).