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Under the environment of big data, retrieval becomes a crucial technology and image retrieval is paid more attention and widely used. The paper proposes a second-order retrieval algorithm, of which can be used to retrieval the similar images. Firstly, extracting image sift features. Then, build frequency table of characteristic words by k-means clustering and bag of word algorithm. Finally, based...
Detection base on feature points contains the characteristics of the whole image, this method is widely used in the field of computer vision. Several popular feature points detection algorithms are discussed, including SIFT feature points detection method and the corner detection methods like Forstner, Harris and SUSAN. In this paper, SIFT, Forstner, Harris and SUSAN are compared by a number of experiments...
In this paper, a new method of using advance beamforming algorithm is proposed to control target focused found. The advance beamforming algorithm that adjusts the timing of sound waves emitted from each speaker in an array. As a result, sound waves cancel each other out in some parts of space, and amplify each other in others, effectively creating a focused beam of sound that acts as target focused...
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