Title :
Compression coding of moving contours on spatio-temporal 2-D plane
Author :
Yoshida, Toshiyuki ; Asami, Tomohiro ; Sakai, Yoshinori
Author_Institution :
Fac. of Eng., Tokyo Inst. of Technol., Japan
Abstract :
A compression coding technique for moving contours is proposed. A set of moving contours is first resampled uniformly to obtain the same number of sampled points on each contour and then the n-th sampled point on the m-th contour (xm(n)ym(n)) is arranged on an m-n spatio temporal plane. Since the horizontal and vertical correlations of xm(n) and ym(n) are considerably high, they can be compressed by using existing image coding techniques. Wavelet-based and DCT-based techniques are utilized and several experimental results are shown. The CAE method is also tested for the same moving contours. As a result, it is confirmed that the wavelet-based compression technique on the spatio-temporal 2-D plane gives the best coding efficiency in the lower bit rate region
Keywords :
data compression; discrete cosine transforms; edge detection; image coding; image motion analysis; image representation; image sampling; transform coding; wavelet transforms; CAE method; DCT-based technique; coding efficiency; compression coding; experimental results; horizontal correlation; image coding; low bit rate; moving contours; spatio-temporal 2D plane; spatio-temporal 2D representation; uniform resampling; vertical correlation; wavelet-based compression; Bit rate; Computer aided engineering; Image coding; MPEG 4 Standard; Motion pictures; Pixel; Shape; Testing;
Conference_Titel :
Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-8821-1
DOI :
10.1109/ICIP.1998.723472
