title: Building keypoint mappings on multispectral images by a cascade of classifiers with a resurrection mechanism.
abstract: Inspired by the boosting technique for detecting objects, this paper proposes a cascade structure with a resurrection mechanism to establish keypoint mappings on multispectral images. The cascade structure is composed of four steps by utilizing best bin first (BBF), color and intensity distribution of segment (CIDS), global information and the RANSAC process to remove outlier keypoint matchings. Initial keypoint mappings are built with the descriptors associated with keypoints; then, at each step, only a small number of keypoint mappings of a high confidence are classified to be incorrect. The unclassified keypoint mappings will be passed on to subsequent steps for determining whether they are correct. Due to the drawback of a classification rule, some correct keypoint mappings may be misclassified as incorrect at a step. Observing this, we design a resurrection mechanism, so that they will be reconsidered and evaluated by the rules utilized in subsequent steps. Experimental results show that the proposed cascade structure combined with the resurrection mechanism can effectively build more reliable keypoint mappings on multispectral images than existing methods.
authors.affiliation: School of Electronic Engineering, Beijing University of Posts and Telecommunications, Rd. Xitucheng 10#, Beijing 100876, China. yli@bupt.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Electronic Engineering, Beijing University of Posts and Telecommunications, Rd. Xitucheng 10#, Beijing 100876, China. jingheiieh@bupt.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Jing
authors.affiliation: School of Electronic Engineering, Beijing University of Posts and Telecommunications, Rd. Xitucheng 10#, Beijing 100876, China. jinhongbin@bupt.edu.cn.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Jin
authors.affiliation: School of Electronic Engineering, Beijing University of Posts and Telecommunications, Rd. Xitucheng 10#, Beijing 100876, China. qiaowei@bupt.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Qiao
keywords: cascade structure; multispectral; resurrection mechanism