|Title:||Vision-based hand gesture recognition|
|Subject:||Hong Kong Polytechnic University -- Dissertations|
|Department:||Department of Computing|
|Pages:||ix, 87 leaves : ill. ; 30 cm.|
|Abstract:||As computer systems have been used more and more widely in our daily life, the ability to interact with them without the need for special equipment is very attractive. Vision based Human Computer Interaction (HCI) has the potential of making this possible in a form that is both easy and natural for people to use. However, there are great technical challenges both in the creation of hand image detector and feature extraction. One strategy to overcome these challenges is to create vision algorithms that are more specific to hand gesture recognition, so this thesis develops a series of systematic techniques for hand gesture recognition. This thesis divides the vision-based hand gesture recognition into three steps: dynamic gesture extraction, modeling and identification. This thesis is mainly focused on the first two steps and the development of novel and effective techniques, and the performance of these techniques can be shown through the identification step. Based on the skin-color dataset, a kind of skin-color classifier is developed to enable the detection of hand in video sequences; a lot of tests are carried out to compare this classifier with other popular ones which are the HSV, YCbCr and KL. The combination of temporal difference and this classifier can extract dynamic gesture and then the hand is modeled using a novel method referred to as the boundary statistical sampling. In the identification part, the BP network is used to recognize these models and output the result. According to the recognition rate of almost 90%, these techniques have more potential research value.|
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