User blog comment:Zolnir/60 Frames Per Second/@comment-24620600-20141213095451/@comment-24620600-20141213103738

Let's say it was 30 fps. I can only think of copying every frame once, to double the number of frames in order to display doubled fps. But with this way, the quality improvements will only be on paper.

Combining two frames (keyframes) to create in-between-frames is a normal working technique in animation, but I don't believe it will work that well with 2D images, as you have less information, which may be important, available for processing.