Abstract
A new real-time lip contour extraction system has been developed. By transforming a RGB image to the LAB color space and with the use of fuzzy clustering technique, the lip region and the skin region can be clearly separated. A 14-point active shape lip model and a new point driven optimization procedure have been developed to extract lip contour using this system.

The system can extract lip contours at a rate of 50 fields per second in the PAL system. In addition, an isolated English digits (Zero to Nine) recognition algorithm based solely on the dynamic visual lip features has been successfully realized.

Applications
• Audio-visual speech recognition and authentication
• 3D face cloning

Contact Information
Mr H Y Wong
Director, Technology Transfer Office
City University of Hong Kong
83 Tat Chee Avenue
Kowloon, Hong Kong
Tel : (852) 2788 8428
Fax : (852) 2788 9119
Email : hy.wong@cityu.edu.hk

簡介
我們開發了一套實時提取嘴唇輪廓的系統。此系統將RGB圖像轉換至LAB顏色空間，並利用模糊聚類技術，清楚地將嘴唇及皮膚的範圍區分出來。系統再利用一個有１４點的活動嘴唇模型及一個新的優化方法，成功提取嘴唇輪廓。
此系統能以每秒５０幀的速率在PAL制式中提取和顯示嘴唇輪廓，倍增影像的分解度。同時，此系統亦能從嘴唇移動的動態特徵識別英文數字（Zero至Nine）。

應用
• 聲頻視像語音識別技術及確認系統
• 人類臉部模型製作

查詢
香港城市大學技術轉移處處長黃漢儀先生
地址 : 香港九龍達之路83號
電話 : (852) 2788 8428
傳真 : (852) 2788 9119
電郵 : hy.wong@cityu.edu.hk