Earticle

초록

영어

Geometric transformations such as rotation or mirroring of JPEG images may result in image quality distortion. Our experiments found further quality degradation of rotated JPEG images as the number of rotations increases. In this paper, we propose a fast and lossless JPEG image transformation in spatial domain based on changes of discrete cosine transform (DCT) coefficient in frequency domain. The key idea of our proposed approach is that permutation and/or sign changes of DCT coefficients in JPEG image results in geometric change without any information loss. Our experiments shows that the proposed transformation algorithm results in no information loss and is faster than conventional methods by 1.67 times on average.

목차

Abstract
 1. Introduction
 2. Proposed Lossless Image Transformation
  2.1. Intra-Block Rotation by DCT Coefficient Change
  2.2. Whole Image Rotation Algorithm in DCT-Domain
 3. Experimental Results
 4. Conclusion
 References

키워드

저자

• Kang Yi [ School of CS. & EE, Handong Global University, Pohang, Korea ]
• Jeong-Hyun Joo [ Department of Computer Engineering, Seoul National University, Seoul, Korea ]
• Kyungmi Kim [ School of Global Leadership, Handong Global University, Pohang, Korea ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Multimedia and Ubiquitous Engineering

• 간기

  월간

• pISSN

  1975-0080

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605