Modeling dynamic characters, in observance of calligraphic rules can be done with the help of parametric curves. The class of Bezier curves is a powerful tool for modeling the outlines of the surface razed by a nib...
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ISBN:
(纸本)9788086943886
Modeling dynamic characters, in observance of calligraphic rules can be done with the help of parametric curves. The class of Bezier curves is a powerful tool for modeling the outlines of the surface razed by a nib's calligrapher. Unfortunately, after capturing the character's hand-drawn outlines, the surface delimited by the outlines doesn't correspond to the space to shade when writing the character. Some of the curves pieces of the outlines are to be subdivided at some appropriate points. In order to identify these points, decompositions of the Bezier curves involved, with respect to particular directions, are necessary. This paper presents a simple and effective mathematical method for doing such decompositions. The proposed method helps to determine the points as extrema of certain functions. Then, the method is implemented and used to design some Arabic dynamical characters. This will help in building dynamic fonts respecting calligraphic strong rules.
Although understanding of shape features in the context of shape matching and retrieval has made considerable progress in recent years, the case for partial and incomplete models in presence of pose variations still b...
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For constructing a tri-dimensional model from range images, they must be registered, i.e., it must be put together into the same coordinate system. There are good algorithms available to perform this, but only after t...
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ISBN:
(纸本)9780889868243
For constructing a tri-dimensional model from range images, they must be registered, i.e., it must be put together into the same coordinate system. There are good algorithms available to perform this, but only after the range images have been brought into positions that are close to the true ones with respect to an arbitrarily chosen reference system. These initial estimates are often provided manually. This paper deals with a technique to compute them automatically. We present a way to determine parameter values that are necessary to control the control flow of a simplified mesh based crude registration, which is characterized by two novel features: drastic data reduction and an expressive shape descriptor.
By analyzing the effect of sub-patch parameters on speed and quality of texture synthesis, we find that for a certain type of images which don't depend on the parameters can obtain rapid and effective synthesis. W...
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In this study we have proposed a new model that allows to generate leaf images from a set of user defined parameters where those parameters are specified by curves. In this model a leaf is constructed from a set of ve...
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ISBN:
(纸本)9780889868243
In this study we have proposed a new model that allows to generate leaf images from a set of user defined parameters where those parameters are specified by curves. In this model a leaf is constructed from a set of vein levels (branches). Additionally we have proposed a method to generate concave and convex shapes from two Bezier curves, where those shapes are used to compose the leaf. There are many studies in the literature that include models of the plants and their leaves together with curves;however, we have focused on generating more detailed leaves with many forms in this study. The novelty of our model comes from the selected parameters and level based approach that are used to generate a leaf. We have developed a user friendly graphical user interface that allows to design leaves easily with simple and intuitive parameters. Those parameters are specified, so that most of the leaf shapes in the nature can be modeled. The model is based on positional information system where graphical methods are used to generate the leaf. The resultant leaf images can either be used as texture on a plant modeling or in a tree generation tool. We have demonstrated a sample leaf which is produced by our application and mapped on a virtual tree at the end of this paper.
A variety of applications nowadays deal with complex dynamical problems where the data sets and interactions change over time. One of the ways to effectively deal with such problems is to employ Delaunay triangulation...
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Techniques to auto-generate professional background music for the home-made video become highly demanded recently with the prevalence of digital video recorders and social media communities. An automated system far su...
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ISBN:
(纸本)9781450304603
Techniques to auto-generate professional background music for the home-made video become highly demanded recently with the prevalence of digital video recorders and social media communities. An automated system far such purpose can significantly relieve users' burden of editing background music to accompany home-made video. However, the major obstacle lies in the fact that the assessment of the video-audio matching quality itself is always subjective. We therefore seek solutions from the rich online sharing professional videos to alleviate this difficulty. Mote specifically, a learning-from-Internet framework is proposed to uncover the underlying structures and rules of the video and audio track association patterns from professional online videos. After collecting a large corpus of online professional videos, a joint probabilistic framework is proposed to model prior knowledge from two aspects, namely, the correlation between video and audio tracks, as well as the transition mode from speech and music components. For novel pure-video input, candidate background music tracks are first selected according to the learnt joint probability model, which are further integrated into a smoothed matching sequence via dynamic programming. Qualitative experiments and comprehensive user studies well demonstrate the effectiveness of the proposed framework for background music auto-generation. Copyright 2010 ACM.
This paper presents a technique for embedding a digital data stream within a digital video stream using wavelet and nonlinear subband decompositions. This technique may enable more efficient use of radio frequency (RF...
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Motion provides a rich modality for communicating emotion and creating affect, and developing techniques for analyzing, manipulating and enhancing animations in video and computer graphics is an active research area. ...
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