Title :
Representing moving images with layers
Author :
Wang, John Y A ; Adelson, Edward H.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
fDate :
9/1/1994 12:00:00 AM
Abstract :
We describe a system for representing moving images with sets of overlapping layers. Each layer contains an intensity map that defines the additive values of each pixel, along with an alpha map that serves as a mask indicating the transparency. The layers are ordered in depth and they occlude each other in accord with the rules of compositing. Velocity maps define how the layers are to be warped over time. The layered representation is more flexible than standard image transforms and can capture many important properties of natural image sequences. We describe some methods for decomposing image sequences into layers using motion analysis, and we discuss how the representation may be used for image coding and other applications
Keywords :
image coding; image segmentation; image sequences; motion estimation; video signals; alpha map; image coding; image representation; image sequences decomposition; intensity map; layered representation; motion analysis; motion estimation; motion segmentation; moving images; overlapping layers; transparency; velocity maps; video sequences; Additives; Animation; Computer graphics; Decoding; Image coding; Image processing; Image sequences; Laboratories; Machine vision; Motion analysis;
Journal_Title :
Image Processing, IEEE Transactions on
