1. Tangrams. https://tangrams.github.io/heightmapper/. Last accessed 2021/01/11
2. Wakayama, T.: A core-line tracing algorithm based on maximal square moving. IEEE Trans. Pattern Anal. Mach. Intell. 1, 68–74 (1982)
3. Reddy, P.R., Amarnadh, V., Bhaskar, M.: Evaluation of stopping criterion in contour tracing algorithms. Int. J. Comput. Sci. Inf. Technol. 3(3), 3888–3894 (2012)
4. Moore, F.R., Langdon, G.G.: A generalized firing squad problem. Inf. Control 12(3), 212–220 (1968)
5. Seo, J., et al.: Fast contour-tracing algorithm based on a pixel-following method for image sensors. Sensors 16(3), 353 (2016)