A kettlebell guides a user to the correct position for holding the device during exercise. It was created using tools developed at MIT that allow 3D objects to change their appearance from different viewpoints. Credit: Zeng et al., MIT
Picture a birthday card that flickers between images of a birthday cake and flowers as you turn the card and view it from different angles. No doubt you can think of other examples of such morphing images in, say, advertisements. Until now, however, the effect has been limited to flat surfaces.
Enter the work of MIT researchers who, for the first …