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In this paper, we present a method for human action recognition using local joints structure and histograms of 3D joints. Global features like histograms of 3D joints [12] ignore the local structure information of the human body joints, which is also essential for accurate action recognition. To address this problem, we propose a local joints structure feature as a complement, and combine both global...
Content-based image retrieval system needs a feature vector with dimensionality as lower as possible. In this paper, we propose an image retrieval system using low-dimensional color feature vector containing only one image feature termed as weighted average of colorful image. For finding similar images, the euclidean distance between the feature vector of query image and each feature vector of database...
This paper addresses the problem of fast similar image retrieval, especially for large-scale datasets with millions of images. We present a new framework which consists of two dependent algorithms. First, a new feature is proposed to represent images, which is dubbed compact feature based clustering (CFC). For each image, we first extract cluster centers of local features, and then calculate distribution...
We report the timing response of a sinusoidal-gated Geiger mode InGaAs/InP avalanche photodiode both in synchronous mode and free-running mode. It is found that the temporal peak of photon counts is dependent on the avalanche build-up and decay times, and the break down probability is a function of the separation between the photon arrival time and the peak of the excess bias gate. We observe broadening...
We demonstrated photon-number resolved detection with sinusoidally gated multipixel photon counter operated at room temperature. Sinusoidal gating minimized the capacitive response noise and improved the photon-number-resolving performance at high repetition rate up to 200 MHz.
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