I. Nurhaida, R. A. M. Zen, V. Ayumi, and H. Wei, “Determining the Number of Batik Motif Object based on Hierarchical Symmetry Detection Approach”, IJEEI, vol. 9, no. 1, pp. 141–152, Mar. 2021, doi: 10.52549/ijeei.v9i1.2369.