IIIumination Invariance and Object Model in Content-Based Image and Video Retrieval

摘要

With huge amounts of multimedia information connected to the global information network (Internet), efficient and effective image retrieval from large image and video repositories has become an imminent research issue. This article presents our research in the C-BIRD (content-based image retrieval in digital-libraries) project. In addition to the use of common features such as color, texture, shape, and their conjuncts, and the combined content-based and description-based techniques, it is shown that (a) color-channel-normalization enables search by illumination invariance, and (b) feature localization and a three-step matching algorithm (color hypothesis, texture support, shape verification) facilitate search by object model in image and video databases.