%0 Report %@ 421 %A Pentland, Alex P. %T Learning and Recognition In Natural Environments %C 333 Ravenswood Ave., Menlo Park, CA 94025 %I AI Center, SRI International %D 1987 %K Learning, Vision!Object recognition %X We present a system for learning descriptions of objects, and for subsequently recognizing learned objects, that functions in outdoor, natural environments. We describe in detail two modes of functioning within this system: (1) unguided, bottom-up learning of object descriptions directly from image data; (2) top-down recognition of objects whose approximate position and structure are known by use of image-level matching. We then argue that the system’s performance in these two modes indicates that robust outdoor performance can be achieved within the structure of our vision system. %U http://www.ai.sri.com/pubs/files/544.pdf
