However, based on the naming convention, it is likely related to one of the following:
In digital forensics or "Capture The Flag" (CTF) competitions, files like this are often used as puzzles where players must find hidden data within the image.
To help me identify the exact paper or context, could you tell me:
It could be a figure or a sample image referenced in a paper authored by someone named Klaudia, or used to demonstrate a specific algorithm (like a filter or compression technique) on a human subject.