TY - GEN
T1 - A direction-adaptive image coding using two-dimensional direct lifting wavelet transform
AU - Kyochi, Seisuke
AU - Aoyama, Junya
AU - Ikehara, Masaaki
PY - 2010/12/1
Y1 - 2010/12/1
N2 - In this paper, a novel direction-adaptive image coding scheme is introduced by using two-dimensional adaptive directional lifting-based wavelet transform (2D-ADLWT). Conventionally, one-dimensional ADLWT (1D-ADLWT) has been proposed. However, it requires large amount of computational cost for optimal lifting direction decision and image transformation. In this work, adaptive directional lifting is implemented by using 2D direct lifting wavelet transform and directional downsampling matrices. Direct 2D lifting structure can reduce the computational cost for image transformation and optimal lifting direction decision significantly. Moreover, in the simulation, it is shown that the proposed method is comparable to the 1D-ADLWT in terms of image coding efficiency. Thus, an effective ADLWT with low computational cost can be provided.
AB - In this paper, a novel direction-adaptive image coding scheme is introduced by using two-dimensional adaptive directional lifting-based wavelet transform (2D-ADLWT). Conventionally, one-dimensional ADLWT (1D-ADLWT) has been proposed. However, it requires large amount of computational cost for optimal lifting direction decision and image transformation. In this work, adaptive directional lifting is implemented by using 2D direct lifting wavelet transform and directional downsampling matrices. Direct 2D lifting structure can reduce the computational cost for image transformation and optimal lifting direction decision significantly. Moreover, in the simulation, it is shown that the proposed method is comparable to the 1D-ADLWT in terms of image coding efficiency. Thus, an effective ADLWT with low computational cost can be provided.
KW - Adaptive directional lifting
KW - Image coding
KW - Wavelet transform
UR - http://www.scopus.com/inward/record.url?scp=78651084789&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651084789&partnerID=8YFLogxK
U2 - 10.1109/ICIP.2010.5649981
DO - 10.1109/ICIP.2010.5649981
M3 - Conference contribution
AN - SCOPUS:78651084789
SN - 9781424479948
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 381
EP - 384
BT - 2010 IEEE International Conference on Image Processing, ICIP 2010 - Proceedings
T2 - 2010 17th IEEE International Conference on Image Processing, ICIP 2010
Y2 - 26 September 2010 through 29 September 2010
ER -