The analysis in Sect. 3.2 suggests a scale-varying process: use a specified α magnification factor over some desired band of spa- tial frequencies, then scale back for the high spatial frequencies (found from Eq. 14 or specified by the user) where amplification would give undesirable artifacts. Figure 6 shows such a modulation scheme for α. Although areas of high spatial frequencies (sharp edges) will be generally amplified less than lower frequencies, we found the resulting videos to contain perceptually appealing mag- nified motion. Such effect was also exploited in the earlier work of Freeman et al. [1991] to create the illusion of motion from still images.