Looks like a mistake, as the authors are listed at the bottom of the article.
At the end of the article is this statement:
"Rubén Osuna is a University Professor at the UNED, Madrid. Efraín García is a professional fashion and advertising photographer."
That might imply that these gentlemen contributed to the article but does not identify them as authors.
I'm sure that this is some type of mixup with migration of the articles to the new server, but the error should be corrected and Figure 1 should display what the caption states.
Bill