Image Classification Using Spatial Pyramid Coding and Visual Word Reweighting

	Image Classification Using Spatial Pyramid Coding and Visual Word Reweighting
	Chunjie Zhang; Jing Liu; Jinqiao Wang; Qi Tian; Changsheng Xu; Hanqing Lu; Songde Ma
	2010
会议名称	Asian Conference on Computer Vision
会议录名称	无
页码	239-249
会议日期	November 8-12, 2010
会议地点	Queenstown, New Zealand
摘要	The ignorance on spatial information and semantics of visual words becomes main obstacles in the bag-of-visual-words (BoW) method for image classification. To address the obstacles, we present an improved BoW representation using spatial pyramid coding (SPC) and visual word reweighting. In SPC procedure, we adopt the sparse coding technique to encode visual features with the spatial constraint. Visual features from the same spatial sub-region of images are collected to generate the visual vocabulary. Additionally, a relaxed but simple solution for semantic embedding into visual words is proposed. We relax the semantic embedding from ideal semantic correspondence to naive semantic purity of visual words, and reweight each visual word according to its semantic purity. Higher weights are given to semantically distinctive visual words, and lower weights to semantically general ones. Experiments on a public dataset demonstrate the effectiveness of the proposed method.
关键词	Bag-of-visual-words (Bow) Image Classification Reweighting Spatialpyramid Coding
收录类别	ISTP
文献类型	会议论文
条目标识符	http://ir.ia.ac.cn/handle/173211/4629
专题	紫东太初大模型研究中心_图像与视频分析
通讯作者	Jing Liu
推荐引用方式 GB/T 7714	Chunjie Zhang,Jing Liu,Jinqiao Wang,et al. Image Classification Using Spatial Pyramid Coding and Visual Word Reweighting[C],2010:239-249.

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