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With the issue that most traditional dithering techniques may bring horizontal and vertical artifacts and grid contouring effects, a novel method for constructing dithering matrix is proposed to improve the half-toning process. Firstly, an appropriate dithering matrix is constructed through element re-composition and discrete rotation based on the primary dispersed-dot Bayer dithering matrix. Secondly,...
A method of forming an elliptical involutes gear is proposed based on Visual LISP implanting AutoCAD in this paper. First, a geometric model is established according to a pinion cutting principle of the involutes profile and geometric location relationship between pinion cutter and pitch curve of elliptical gear. It makes pinion cutter do pure rolling on a pitch curve of elliptical gear. Then the...
We propose a novel probabilistic framework for learning visual models of 3D object categories by combining appearance information and geometric constraints. Objects are represented as a coherent ensemble of parts that are consistent under 3D viewpoint transformations. Each part is a collection of salient image features. A generative framework is used for learning a model that captures the relative...
Based on the 3D visualization technique, a visualization system of excavation was developed to display dynamic excavation warning status clearly, which proved the techniques successful and also useful for the decision-makers to get the information about the excavation and keep the excavation in safe status. With regard to the actual data of a monitoring project, the system was applied for the forecasting...
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