Slideshow generating apparatus, slideshow-data generating apparatus, control methods therefor and programs for controlling same

摘要

A background image wherein areas in which still images are to be rendered have been defined is prepared. Product images are obtained by multiplying mask images and positioned still images together. The background image and the product images are added to obtain a sum image that constitutes one frame of a slideshow. A plurality of still-image portions obtained from a plurality of still images in one frame are contained in the sum image. An advanced slideshow is thus obtained.