Design of piecewise weighted linear interpolation based on even-odd decomposition and its application to image resizing

• Published in: IEEE transactions on consumer electronics Vol. 55; no. 4; pp. 2280 - 2286
• Main Authors: Choi, Byong-Deok, Yoo, Hoon
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Application software; Complexity; Computational efficiency; Convolution; cubic convolution interpolation; Decomposition; Design engineering; Design methodology; Electronics; Flow graphs; Image interpolation; Image quality; image resizing; Interpolation; Kernel; low complexity; Mathematical analysis; Radiofrequency interference; Vectors; Vectors (mathematics)
• ISSN: 0098-3063; 1558-4127
• DOI: 10.1109/TCE.2009.5373799

In this paper, an image interpolation method based on even-odd decomposition (EOD) is proposed. An input signal for interpolation is decomposed to even and odd vectors by EOD. And then different interpolation methods are applied to even and odd vectors, respectively. This paper presents an analysis on the two vectors and new design methods for them. Also, based on the new design method, a signal flow graph of the proposed method is provided and compared with the CCI method in terms of complexity. To evaluate the proposed method, we conduct experiments and complexity comparison. The results indicate that the proposed interpolation method does not only outperform the existing method in terms of objective and subjective image quality but also requires less complexity.