Correction to: Hybrid image of three contents

In the original publication of this article [1], the Figs. 3 and 4 are not clear enough. They are adjusted the size and showed as below:

Bibliographic Details
Main Authors: Peeraya Sripian, Yasushi Yamaguchi
Format: Article
Language:English
Published: SpringerOpen 2020-03-01
Series:Visual Computing for Industry, Biomedicine, and Art
Online Access:http://link.springer.com/article/10.1186/s42492-020-00046-w