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The most popular approach to large scale image retrieval is based on the bag-of-visual-word (BoV) representation of images. The spatial information is usually reintroduced as a post-processing step to re-rank the retrieved images, through a spatial verification like RANSAC. Since the spatial verification techniques are computationally expensive , they can(More)
Higher order spatial features, such as doublets or triplets have been used to incorporate spatial information into the bag-of-local-features model. Due to computational limits, researchers have only been using features up to the 3rd order, i.e., triplets, since the number of features increases exponentially with the order. We propose an algorithm for(More)
The sliding window approach has been widely used for object detection because it provides a simple way to apply object recognition techniques to the detection task. Despite its effectiveness, though, the exhaustive search makes the approach inefficient in the case of a non-trivial classifier. The branch and bound techniques [3, 4] have been proposed in(More)
The conventional SRAMs, namely four-transistor SRAM (4T) and six-transistor SRAM (6T), suffered from the external noise, because they have direct paths through bit-line(BL) to their storage nodes. This paper proposes seven-transistor (7T) SRAM which has no direct path through BL to the data storage nodes and has higher endurance against external noise. The(More)
A 4-phase cross-coupled charge pump with charge sharing clock scheme is proposed in this paper. Four phase clock is utilized to prevent the reverse leakage current. A charge sharing clock control circuit is constructed, and the consumption in charging or discharging the bottom plate parasitic capacitance of the boost capacitors is reduced by half. The(More)
The local feature based approaches have become popular for activity recognition. A local feature captures the local movement and appearance of a local region in a video, and thus can be ambiguous; e.g., it cannot tell whether a movement is from a person's hand or foot, when the camera is far away from the person. To better distinguish different types of(More)
High order features have been proposed to incorporate geometrical information into the "bag of feature" representation. We propose algorithms to perform fast weakly supervised object categorization and localization with high order features. To this end, we first use Hough transform method to identify translation and scale invariant high order features(More)
BACKGROUND The risk of sexual HIV transmission in serodiscordant couples when the HIV-positive partner has full virologic suppression on combination antiretroviral therapy (cART) is debated. This study aims to systematically review observational studies and randomized controlled trials (RCTs), evaluating rates of sexual HIV transmission between heterosexual(More)