Pictures that have been stored loose in a box may get folded or scratched when handled for viewing.
This example has very visible scratches or folds. The obvious and less obvious creases and scratches were removed. The crescent line in the man's vest was retained as it was presumed to be a watch chain. The brightness and contrast did not require a significant adjustment.
This example has a few creases that were removed. In addition, the curtains were "closed" above the dog's head to improve the composition. Lastly, the brightness and contrast were adjusted to bring out more detail.