IEEE Trans Vis Comput Graph - Interactive Visualization of Rotational Symmetry Fields on Surfaces.

Tópicos

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Resumo

Rotational symmetries have found uses in several computer graphics applications, such as global surface parameterization, geometry remeshing, texture and geometry synthesis, and non-photorealistic visualization of surfaces. The visualization of N-way rotational symmetry (N-RoSy) fields is a challenging problem due to the ambiguities in the N directions represented by an N-way symmetry. We provide an algorithm that allows faithful and interactive representation of N-RoSy fields in the plane and on surfaces, by adapting the well-known Line Integral Convolution (LIC) technique from vector and second-order tensor fields. Our algorithm captures the N directions associated with each point in a given field by decomposing the field into multiple different vector fields, generating LIC images of these fields, and then blending the results. To address the loss of contrast caused by the blending of images, we observe that the pixel values in LIC images closely approximate normally distributed random variables. This allows us to use concepts from probability theory to correct the loss of contrast without the need to perform any image analysis at each frame.

Resumo Limpo

rotat symmetri found use sever comput graphic applic global surfac parameter geometri remesh textur geometri synthesi nonphotorealist visual surfac visual nway rotat symmetri nrosi field challeng problem due ambigu n direct repres nway symmetri provid algorithm allow faith interact represent nrosi field plane surfac adapt wellknown line integr convolut lic techniqu vector secondord tensor field algorithm captur n direct associ point given field decompos field multipl differ vector field generat lic imag field blend result address loss contrast caus blend imag observ pixel valu lic imag close approxim normal distribut random variabl allow us use concept probabl theori correct loss contrast without need perform imag analysi frame

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