As a student, you have the right to use copyrighted images in text or in a presentation internally at JU via an agreement with Bonus Copyright Access. (Some exceptions exist, see Guide to Reproduction at Higher Education Institutions). Always add a reference.
However, if you want to use an image in a text that is to be published in, for example, DiVA, the above does not apply. In most cases, you need to ask permission from the publisher to publish the image in your text. Exceptions exist when it is stated that the image is free for use (Public Domain) or has a so-called Creative Commons license. In most cases, you need to specify the attribution.
Read more about how to handle copyright material in our guide here: Pictures and Copyright.
Da Vinci, L. (1517). Mona Lisa [Oil on poplar panel]. The Louvre Museum, Paris, France.
Da Vinci, L. (1517). Mona Lisa [Oil on poplar panel]. The Louvre Museum, Paris, France. https://www.louvre.fr/en/oeuvre-notices/mona-lisa-portrait-lisa-gherardini-wife-francesco-del-giocondo
GDJ. (2018). Neural network deep learning prismatic [Clip art]. OpenClipart. http://openclipart.org/detail/309343/neural-network-deep-learning-prismatic
Radiating ripples [Photography]. (2006). Retrieved March 14, 2014, from http://www.bergoiata.org/fe/divers28/10.htm
[Photography of a giraffe, no title]. (n.d.). Retrieved March 14, 2014, from http://www.birminghamzoo.com/animals/