Reverse Diffusion
نویسنده
چکیده
In this paper we consider 3D object surfaces which can be represented as scalar functions defined on the sphere. These objects can be modeled as series of spherical harmonic functions. A simple progressive transmission scheme could be implemented which transmits the expansion coefficients one by one and thus implements a coarse to fine reconstruction. The buildup of the object according to this scheme is not completely smooth: Wavy patterns appear which disappear in subsequent stages and are replaced by finer spurious patterns and so on. We propose a remedy for this behavior which is based on the simulation of a reversed diffusion process on the sphere.
منابع مشابه
Comparison the performance of different reverse osmosis membrane modules by CFD modeling
Reverse osmosis is a commonly used process in water desalination. Due to the scarcity of freshwater resources and wastewater problems, a lot of theory and experimental studies have been conducted to optimize this process. In the present study, the performance of reverse osmosis membrane module of salt–water separation was simulated based on computational fluid dynamics technique and solution-di...
متن کاملEvaluation of Sharpness Measures and Proposal of a Stop Criterion for Reverse Diffusion in the Context of Image Deblurring
The heat equation can be used to model the diffusion process shown in a defocused (blurry) region of a picture taken with conventional camera lens. The original focused image can be recovered by reverting the heat equation, that is, by reverse diffusion. However, the main difficulty with this technique is that it becomes unstable very quickly due to the finite precision of pixel values and the ...
متن کاملReverse - Time Diffusion Equation Models *
Stochastic differential equations have a built-in direction of time flow since future increments in the driving process are assumed independent of present and past values of the process defined by the solution of the equation. The differential equations are thought of as evolving forward in time, normally from some fixed initial time, and the integral representation of a solution, involving as ...
متن کاملNetwork robustness and irreversibility of information diffusion in Complex networks
Complex networks are characterized based on a newly proposed parameter, “degree of diffusion ̨”. It defines the ratio of information adopters to non-adopters within a diffusion process over consecutive penetration depths. Furthermore, the perfectness of a social network is evaluated by exploring different variations of ̨ such as the reverse diffusion ( ̨reverse) and the random-kill-diffusion (RK...
متن کاملThe Motivation, Facilitation and Limitations of HRM Practice Diffusion: A Study of Chinese Multinationals
With the increasing global integration, diffusion of “best practice” is a critical activity in an MNC, in particular, MNCs from countries who have recently joined in global markets to learn the best practice in their international operations. In the current research on MNCs’ HRM diffusion, ‘reverse diffusion’ is argued to be an important approach in the internationalision of managements. Howeve...
متن کاملForward and reverse representations for Markov chains
In this paper we carry over the concept of reverse probabilistic representations developed in Milstein, Schoenmakers, Spokoiny (2004) for diffusion processes, to discrete time Markov chains. We outline the construction of reverse chains in several situations and apply this to processes which are connected with jump-diffusion models and finite state Markov chains. By combining forward and revers...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002