Color pattern recognition by quaternion correlation. - Soo-Chang Pei; Jian-Jiun Ding; Ja-Han Chang (ICIP (1), 2001)

Efficient implementation of quaternion Fourier transform, convolution, and correlation by 2-D complex FFT. - Soo-Chang Pei; Jian-Jiun Ding; Ja-Han Chang (IEEE Trans. Signal Process., 2001)

Quaternion matrix singular value decomposition and its applications for color image processing. - Soo-Chang Pei; Ja-Han Chang; Jian-Jiun Ding (ICIP (1), 2003)

2D quaternion Fourier spectral analysis and its applications. - Ja-Han Chang; Soo-Chang Pei; Jian-Jiun Ding (ISCAS (3), 2004)

Commutative reduced biquaternions and their Fourier transform for signal and image processing applications. - Soo-Chang Pei; Ja-Han Chang; Jian-Jiun Ding (IEEE Trans. Signal Process., 2004)

Eigenvalues and Singular Value Decompositions of Reduced Biquaternion Matrices. - Soo-Chang Pei; Ja-Han Chang; Jian-Jiun Ding; Ming-Yang Chen (IEEE Trans. Circuits Syst. I Regul. Pap., 2008)