TY - GEN
T1 - Analysis of echoes in single-image random-dot-stereograms
AU - Lau, M. S.K.
AU - Kwong, C. P.
N1 - Publisher copyright:
© 2001 IEEE
PY - 2001/5/7
Y1 - 2001/5/7
N2 - Three-dimensional depth information of a surface can be encoded in a two-dimensional image called single-image random-dot-stereograms or, more widely known, autostereograms. It is achieved by using the correlations of pixels in the horizontal direction. Using the correspondences between pixels in human brains or computer algorithms, surfaces can be reconstructed from au-stereograms. However, in some cases, the reconstructed surfaces are not unique because of "echoes". In the presence of echoes, reconstruction of the original surface from an autostereogram cannot be guaranteed since no cue of the original surface is available in autostereograms. In this paper, the causes of echoes are investigated and conditions for echo-free reconstructions are derived. Based on these conditions, an improved autostereogram generation algorithm is proposed to guarantee echo-free autostereograms. Besides, the surface reconstruction algorithm is modified such that the originally encoded surfaces can always be reconstructed from echo-free autostereograms.
AB - Three-dimensional depth information of a surface can be encoded in a two-dimensional image called single-image random-dot-stereograms or, more widely known, autostereograms. It is achieved by using the correlations of pixels in the horizontal direction. Using the correspondences between pixels in human brains or computer algorithms, surfaces can be reconstructed from au-stereograms. However, in some cases, the reconstructed surfaces are not unique because of "echoes". In the presence of echoes, reconstruction of the original surface from an autostereogram cannot be guaranteed since no cue of the original surface is available in autostereograms. In this paper, the causes of echoes are investigated and conditions for echo-free reconstructions are derived. Based on these conditions, an improved autostereogram generation algorithm is proposed to guarantee echo-free autostereograms. Besides, the surface reconstruction algorithm is modified such that the originally encoded surfaces can always be reconstructed from echo-free autostereograms.
UR - https://www.scopus.com/pages/publications/0034855009
U2 - 10.1109/ICASSP.2001.941260
DO - 10.1109/ICASSP.2001.941260
M3 - Conference proceeding
AN - SCOPUS:0034855009
SN - 0780370414
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 1677
EP - 1680
BT - 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings
PB - IEEE
T2 - 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing
Y2 - 7 May 2001 through 11 May 2001
ER -