A Block-Edge-Pattern-Based Content Descriptor in DCT Domain

In this correspondence, we describe a robust and effective content descriptor based on block edge patterns extracted directly in DCT domain, which is suitable for applications in JPEG or MPEG compressed images and videos. This content descriptor is constructed by a run-length edgeblock histogram with three patterns including horizontal edge, vertical edge and no-edge. In comparison with existing descriptors, the proposed features: (i) low-cost computing suitable for real-time implementation and high-speed processing of compressed images or videos; (ii) robust to orientation changes such as rotation, noise, reverse etc. (iii) directly operates in compressed domain. Extensive experiments support that the proposed content descriptor is effective in describing visual content. In comparison with existing techniques, the proposed descriptor achieves superior performances in terms of retrieval precision and recall rates. Indexing Terms -- Content descriptors, MPEG, Compressed domain video ana...

• Type: Journal
• Year: 2008
• Where: TCSV
• Authors: Jianmin Jiang, Kaijin Qiu, Guoqiang Xiao
• Keywords: Content Descriptors, Effective Content Descriptor, MPEG Compressed Images, TCSV 2008