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THE LOW BACKSCATTERING OBJECTS CLASSIFICATION IN POLSAR IMAGE BASED ON BAG OF WORDS MODEL USING SUPPORT VECTOR MACHINE
Low Backscattering Objects Bag of Words SIFT features Support Vector Machine
2018/5/16
Due to the forward scattering and block of radar signal, the water, bare soil, shadow, named low backscattering objects (LBOs), often present low backscattering intensity in polarimetric synthetic ape...
While developing an approach to why-QA, we extended a passage retrieval system that uses offthe-shelf retrieval technology with a re-ranking step incorporating structural information. We
get signi...
基于“Bag of Words”的视频匹配方法
视频匹配 视觉关键词 Bag of Words 倒排索引
2010/12/17
面对海量的视频数据，高效的视频匹配和检索的方法显得至关重要。本文提出了一种利用 “Bag of Words”模型对视频内容进行建模和匹配的方法。通过量化视频帧的局部特征构建视觉关键词（visual words）辞典，将视频的子镜头表示成若干视觉关键词的集合。在此基础上构建基于子镜头的视觉关键词词组的倒排索引，用于视频片段的匹配和检索。这种方法保留了局部特征的显著性及其相对位置关系，而且有效地压缩了...