TY - GEN
T1 - A study on two-layer coding for animation images
AU - Nakagami, Ouji
AU - Miyazwa, Toshinori
AU - Watanabe, Hiroshi
AU - Tominaga, Hideyoshi
N1 - Publisher Copyright:
© 2002 IEEE.
PY - 2002
Y1 - 2002
N2 - A coding scheme specifically designed for animation images is proposed. Taking the characteristics of animation images into account, lines and homogeneous color regions are extracted from animation images. Lines and contours of the homogeneous color regions are approximated by straightline and spline functions. We found that smoothing operations are effective to extract homogeneous regions from background images. A connected filter is used for the smoothing operation while keeping edges of the original image correctly. Precise approximation of the contours is also required. For this purpose, we propose to use dynamic programming with a feedback algorithm. As a result, an animation image can be represented by two layers; significant points as a base layer, and discrete cosine transform (DCT) blocks for an additional layer. For the compensation of the loss caused by the smoothing operation, the DCT is applied to the difference between the original images and lines and homogeneous color regions images. High-quality images can be obtained by adding this differential data to the approximated images.
AB - A coding scheme specifically designed for animation images is proposed. Taking the characteristics of animation images into account, lines and homogeneous color regions are extracted from animation images. Lines and contours of the homogeneous color regions are approximated by straightline and spline functions. We found that smoothing operations are effective to extract homogeneous regions from background images. A connected filter is used for the smoothing operation while keeping edges of the original image correctly. Precise approximation of the contours is also required. For this purpose, we propose to use dynamic programming with a feedback algorithm. As a result, an animation image can be represented by two layers; significant points as a base layer, and discrete cosine transform (DCT) blocks for an additional layer. For the compensation of the loss caused by the smoothing operation, the DCT is applied to the difference between the original images and lines and homogeneous color regions images. High-quality images can be obtained by adding this differential data to the approximated images.
UR - http://www.scopus.com/inward/record.url?scp=84908352145&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908352145&partnerID=8YFLogxK
U2 - 10.1109/ICME.2002.1035858
DO - 10.1109/ICME.2002.1035858
M3 - Conference contribution
AN - SCOPUS:84908352145
T3 - Proceedings - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002
SP - 621
EP - 624
BT - Proceedings - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2002 IEEE International Conference on Multimedia and Expo, ICME 2002
Y2 - 26 August 2002 through 29 August 2002
ER -