Fast Image Segmentation Based on Efficient Implementation of the Chan-Vese Model with Discrete Gray Level Sets

Figure 4

The level lines at different gray levels. (a) The noise image with Gaussian white noise of mean 0 and variance 0.2. (b) The smooth image by Gaussian low pass filter with 𝜎=1.5. (c)–(g) The level lines of the noise image at the gray level, 60, 80, 120, 180, and 200. (h)–(l) The level lines of the smooth image at the gray level, 60, 80, 120, 180, and 200.

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