Fast Block-Based True Motion Estimation Using Distance Dependent Thresholds

With advances in both communication and multimedia technologies, there is a critical need to have visual management systems or user-friendly tools to assist in information retrieval from digital multimedia databases. Amongst the salient features that could be used to define visual content for example, are pixel intensity, colour, texture, shape and motion. Of these, motion is the most obvious and effective feature to provide global and local understanding as well as describing the dynamic content within a video sequence. The extraction of motion parameters from video sequences has therefore, been one of the key elements in a range of applications from computer vision through to