With apologies to the authors, we regret the following error that appeared in the article, "Rule-Based Automatic Generation of Logo Designs" by Yi-Na Li,
Kang Zhang and Dong-Jin Li in Leonardo vol. 50, No. 2, 2017.
The attribution for author Kang Zhang should read:
Kang Zhang (educator), corresponding author, Department of Computer Science, The University of Texas at Dallas, U.S.A. 75080-3021; Faculty of Information Technology, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, China. Email: <firstname.lastname@example.org>. [End Page 346]