Last month we described some work on the frame interpolation component of the software, and GroupB represents the debut of those improvements. This animation contains 5 minutes of 720x480 video at 30 frames per second, which is 9000 frames. Rather than calculate all 9000 frames individually, 163 master images at a much higher resolution were calculated. Digital zoom techniques were then used to make the 9000 final frames in the video. This results in about a 75% reduction in the rendering time.
The only other significant video project on HPDZ.NET that uses frame interpolation is Tevaris, published in 2007, when the interpolation component of the software was rather primitive. The high-quality renderings of Tevaris show a subtle glitchy artifact when the video switches to a new master frame. This gets annoying very quickly.
GroupB demonstrates a significant improvement in the interpolation technology since that time. By overlapping video segments generated from individual master images, the transition from one master image to another is invisible. By blending together video segments from adjacent master frames, the glitchy artifact is eliminated, and the video is indistinguishable from one with individually rendered frames.
GroupB is the absolute simplest possible type of zoom animation that can be made, just zooming straight into a single point with no acceleration, no deceleration, and no lateral movement or zoom-out. Future projects will take full advantage of the more powerful frame interpolation software and its ability to optimally render complex motion.
A Historical Point
CanyonDeepTrial1 was the first video published on HPDZ that used the overlapping master image technique, although the implementation at that time was very buggy and could not properly handle lateral motion.