Ching-Min Cheng

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This paper presents a new moment-preserving thresholding technique, called the binary quaternion-moment-preserving (BQMP) thresholding, for color image data. Based on representing color data by the quaternions, the statistical parameters of color data can be expressed through the definition of quaternion moments. Analytical formulas of the BQMP thresholding(More)
To compress color-pixel blocks, a novel color BTC algorithm , called the quaternion-moment block truncation coding (QMBTC), is presented in this paper. The QMBTC are derived by using the quaternion arithmetic and moment preserving principle. The proposed color BTC algorithm can adaptively truncate a pixel block into one or two output classes according to(More)