It may be a specific sample from a dataset used for facial recognition , biometrics , or steganography research, where individual subjects are often labeled with names followed by a number.
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. klaudia1.png
However, based on the naming convention, it is likely related to one of the following: It may be a specific sample from a
To help me identify the exact paper or context, could you tell me: or steganography research
I can then help you track down the specific research it belongs to.