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A Composite Illumination Invariant Color Feature and Its Application to Partial Image Matching
Masaki KOBAYASHI Keisuke KAMEYAMA
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/10/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Image Recognition, Computer Vision
color invariants, photometric invariants, illumination invariant color features, image matching, SIFT, RANSAC, CBIR,
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In camera-based object recognition and classification, surface color is one of the most important characteristics. However, apparent object color may differ significantly according to the illumination and surface conditions. Such a variation can be an obstacle in utilizing color features. Geusebroek et al.'s color invariants can be a powerful tool for characterizing the object color regardless of illumination and surface conditions. In this work, we analyze the estimation process of the color invariants from RGB images, and propose a novel invariant feature of color based on the elementary invariants to meet the circular continuity residing in the mapping between colors and their invariants. Experiments show that the use of the proposed invariant in combination with luminance, contributes to improve the retrieval performances of partial object image matching under varying illumination conditions.