A NIMATED GIF S Adapted from in_photos.htm in_photos.htm

W HY GIF? The GIF file format supports animation JPEG format does not support animation The browser treats an animated GIF the same as a static GIF file In the browser an animated GIF displays several images in sequence - like a slide show different frames can contain different timings (some slow, others with quicker speed)

GIF F ILE S IZE FOR W EB Animated GIFs will always be larger than static GIFs ImageReady has 2 animation compression features— Bounding Box & Redundant Pixel Removal These compression features are turned on by default ImageReady will add file size only for the areas that have changed in your animation i.e. In a photographic background, if the only thing that changes is some lettering that fades over it, the photographic area will be written only once to the file, limiting the total file size

T IMING A NIMATED GIF S Animation is time-based it depends on time passing and artwork changing Slowly changing artwork appears to sit for a long time and then change Quickly changing artwork appears to have more fluid movement For slide-show style animation - GIF format supports delays between frames, which allows for timing to change within a single animation file

P LAY -B ACK R ATE Video & film animation are time-based mediums Key difference from animated GIFs: they play back at specific frame rates (video: 30 frames per second; film: 24 frames per second) Animated GIFs may play back at different speeds depending on the computer upon which they are viewed. You can’t control the viewing speed of an animation you make

A NIMATION A ESTHETICS : T HE G OOD, T HE B AD, AND T HE U GLY Animation creates an emphasis point on the page Question: Is the subject matter you pick for animation worthy of more attention than other images on the page? Note: Animation will distract from the important content --rather than enhance it Good uses for animation might include diagrams brought to life or slide shows of photographs