Pictures can be used in theses according to the right of quotation. Screenshots or screen captures from the user interface are not pictures that exceed the prerequisites of originality for pictures, and can be used, but if text or other pictures are shown in them, guidelines and laws regarding copy rights and personal data have to be considered. In this case you can for example blur one part of the picture.
Pictures taken or made by oneself can of course be used freely according to copyright laws, as long as legislation on personal data is followed.
Below is a summary of the issues to consider when using images in a thesis (Sinisalo 2021):
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Sinisalo, R. 2021. Kuvien käyttö julkaisuissa. Available at: https://aoe.fi/#/materiaali/1531. Accessed 9.10.2024.