Extraction of three-dimensional shape from optic flow: a geometric approach
نویسندگان
چکیده
منابع مشابه
Three-dimensional characteristic approach for incompressible thermo-flows and influence of artificial compressibility parameter
In this paper the characteristics of unsteady three-dimensional incompressible flows with heat transfer are obtained along with artificial compressibility of Chorin. At first, compatibility equations and pseudo characteristics for three-dimensional flows are derived from five governing equations (continuity equation, Momentum equations in three directions, and energy equation) and then results ...
متن کاملVariations in fish body and scale shape among Aphanius dispar (Cyprinodontidae) populations: insights from a geometric morphometric analysis
Phenotypic variations in fish body and scale shape were investigated among the three populations of Aphanius dispar (Rüppell, 1829)in Southern Iran through the use of landmark-based geometric morphometric analyses. This species is widely distributed in the region, and therefore, considerable morphological variations exist among the geographically allopatric populations. Based on the Principle C...
متن کاملExtraction of 3D shape from optic flow: a geometric approach
We derive several measures of 3D shape directly from the velocity field generated by a rigid curved surface patch under perspective projection. We use invariance under rotation of the image plane to decompose the velocity field in differential invariants. From a combination of these invariants we construct an approximation to the absolute value of the shape index, to the curvedness and to the p...
متن کاملAerodynamic Design Optimization Using Genetic Algorithm (RESEARCH NOTE)
An efficient formulation for the robust shape optimization of aerodynamic objects is introduced in this paper. The formulation has three essential features. First, an Euler solver based on a second-order Godunov scheme is used for the flow calculations. Second, a genetic algorithm with binary number encoding is implemented for the optimization procedure. The third ingredient of the procedure is...
متن کاملStudy of geometric shape and water circulation pattern in fish tanks using computational fluid dynamics
Providing comfort conditions for fish from the point of view of velocity uniformity and flow regime is one of the most important requirements of aquaculture improving the production conditions. In this research, for this purpose, by using computational fluid dynamics, Fluent software and k-ɛ turbulence model, the geometrical shape and pattern of water circulation in a fish breeding pond have be...
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 2017