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In recent yeas, VLAD has been used to represent an image effectively and efficiently by just a few bytes in large-scale image retrieval. In spite of its remarkable performance, a series of modification methods have been presented. In addition, the redundancy between the features corresponding to the same cluster center could be improved. In this paper, a regional PCA Whitening method is proposed to...
A key development in the design of visual object recognition systems is the combination of multiple features. In recent years, various popular optimization based feature combination methods have been proposed in the literatures. However, those methods obtain tiny performance improvement at the cost of enormous computation consumption. In this paper, we propose an improved averaging combination (IAC)...
Spatial pyramid (SP) representation is an extension of bag-of-feature model which embeds spatial layout information of local features by pooling feature codes over pre-defined spatial shapes. However, the uniform style of spatial pooling shapes used in standard SP is an ad-hoc manner without theoretical motivation, thus lacking the generalization power to adapt to different distribution of geometric...
In IEEE 1857/AVS decoder, the deblocking filter is one of the most time consuming tasks and it accounts for nearly 30% of the decoder complexity. Due to data dependence in the process of filtering, it is a big challenge to execute deblocking filter in parallel efficiently. In this paper, a parallel algorithm is proposed, which hides the data dependence by dividing a frame into several 8 x 8 Intersection-blocks...
Video stabilization enhances video quality by stabilizing unstable motion. This paper proposes a new video stabilization method that simultaneously factors and smooths motion trajectories. We model the trajectories with a time-variant local subspace constraint. Every column of the trajectory matrix is factored and smoothed in separate local subspace. This model makes our method more flexible and accurate...
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