To help you find the original source or the full set of images, could you or describe the subject matter (e.g., a specific model, clothing brand, or car)?
As unique identifiers for digital assets. dlux01053.jpg
To track raw files or proofs from a specific shoot. To help you find the original source or
For cataloging product shots (often luxury or "deluxe" items). a specific model
Filenames like "dlux" followed by a number are often internal naming conventions used by specific:
Once I have a visual or descriptive context, I can identify the photographer, the brand, or the publication where the full feature appeared.