Abstract: This paper presents newsolutions to the following three problems in image morphing: feature specification, warp generation, and transition control. To reduce the burden of feature specification, we first adopt a computer vision technique called snakes. We next propose the use of multilevel free-form deformations (MFFD) to achieve $<$i$>$C$<$sup$>$2$<$/sup$>$$<$/i$>$- continuous and one-to-one warps among feature point pairs. The resulting technique, based on B-spline approximation, is simpler and faster than previous warp generation methods. Finally, we simplify the MFFD method to construct $<$i$>$C$<$sup$>$2$<$/sup$>$$<$/i$>$-continuous surfaces for deriving transition functions to control geometry and color blending.