Applications of 3-D Halftoning in Various Aspects

Dr. Y.H. Chan and Prof. W.C. Siu

The objective of this project is to develop practical low-cost video coders and display products.  Sometimes we have to use a display of lower quality to play a video sequence as a desirable video display is not always available under various constraints in practice.  The question that follows is whether it is possible to make the played sequence perceptually as good as if it were played in the desirable display.  Halftoning is a technique to used achieve this goal.  However, conventional halftoning methods are used for displaying images instead of video sequences.  In our proposed approach, we process the pixels in both spatial and temporal domains simultaneously.  As a result, a smoother apparent optical flow between consecutive frames of a video sequence can be achieved.  Based on this proposed algorithm, we are developing a practical low-cost video coder for mobile communication and a low-cost display for various applications including digital photo frames.

Low cost video display unit using the new halftoning technique