II. THE STORYBOARD-BASED INTERFACE DESIGN
Storyboards, i.e., temporal arrangements of frames extracted from a video, have proven to be very efficient and useful representations for search tasks (cf., for example [6,7] for excellent overviews of video search and browsing interfaces). These frames are usually shown in miniaturized form, i.e., as so-called thumbnails, and temporally sorted from left to right and top to bottom (cf. Fig. 1, left). They are often extracted either in regular time intervals or based on video content analysis (e.g., one frame per scene if automatic scene segmentation is applied). Important design decisions therefore include what frames are extracted, the size of the thumbnails, and how they are arranged on the screen.