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Census transform is a non-parametric local transform. Its weakness is that the results relied on the center pixel too much. This paper proposes a modified Census transform based on the neighborhood information for stereo matching. By improving the classic Census transform, the new technique utilizes more bits to represent the differences between the pixel and its neighborhood information. The result...
The paper studied a dynamic model for a 6-PSS parallel robot. First, a general method to calculate the inverse dynamics model of the parallel robot has been given out, and then the direct dynamics model with Lagrange method has been established. Comparing with the traditional method which use the input as the generalized coordinates, using pose as a method of generalized coordinates can greater improve...
Many stream-based applications have real-time performance requirements for continuous queries over time varying data streams. In order to address this challenge, a real-time continuous query model is presented to process multiple queries with timing constraints. In this model, the execution of one tuple passing through an operator path is modeled as a real-time task instance. A fine-grained scheduling...
When streams rates exceed the system capacity, a data stream management system (DSMS) becomes overloaded and fails to satisfy all kinds of requirements, such as tuple latency and result precision. Especially, in a time-critical environment, queries should be completed not just timely but within certain deadlines. Semantic load shedding is an effective approach to alleviate workloads. In order to improve...
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