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Noise Control Boundary Image Matching Using Time-Series Moving Average Transform  

Kim, Bum-Soo (강원대학교 컴퓨터과학과)
Moon, Yang-Sae (강원대학교 컴퓨터학부 컴퓨터과학전공)
Kim, Jin-Ho (강원대학교 컴퓨터학부 컴퓨터과학전공)
Abstract
To achieve the noise reduction effect in boundary image matching, we use the moving average transform of time-series matching. Our motivation is based on an intuition that using the moving average transform we may exploit the noise reduction effect in boundary image matching as in time-series matching. To confirm this simple intuition, we first propose $\kappa$-order image matching, which applies the moving average transform to boundary image matching. A boundary image can be represented as a sequence in the time-series domain, and our $\kappa$-order image matching identifies similar images in this time-series domain by comparing the $\kappa$-moving average transformed sequences. Next, we propose an index-based matching method that efficiently performs $\kappa$-order image matching on a large volume of image databases, and formally prove the correctness of the index-based method. Moreover, we formally analyze the relationship between an order $\kappa$ and its matching result, and present a systematic way of controlling the noise reduction effect by changing the order $\kappa$. Experimental results show that our $\kappa$-order image matching exploits the noise reduction effect, and our index-based matching method outperforms the sequential scan by one or two orders of magnitude.
Keywords
Time-series databases; data mining; boundary image matching; time-series matching; moving average transform;
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