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pro vyhledávání: '"Marcelo Walter"'
Publikováno v:
Computer Graphics Forum. 25:675-684
We present a wavelet-based approach for selecting patches in patch-based texture synthesis. We randomly select the first block that satisfies a minimum error criterion, computed from the wavelet coefficients (using 1D or 2D wavelets) for the overlapp
Autor:
Fabiane Queiroz, Marcelo Walter
Publikováno v:
SIBGRAPI
The seamless integration of the shape and visual attributes of virtual objects is still one of the greatest challenges in Computer Graphics. For some natural objects, such as patterned animals, shape and appearance are mutually connected and therefor
Publikováno v:
SIBGRAPI
There has been a lot of progress in modeling and rendering elements of our Natural World for computer graphics tasks. In the Plant Kingdom, techniques for modeling the visual patterns presented in many natural objects (such as stripes on a watermelon
Publikováno v:
Pacific Conference on Computer Graphics and Applications
We present an improved method for synthesis of patterns defined as 2D collection of vector elements. Current solutions to this problem rely on triangulation of the input space or statistical measures of the sample to drive the synthesis step. We prop
Autor:
Rui M. Bastos, Rafael P. Torchelsen, Marcelo Walter, João Luiz Dihl Comba, Guilherme N. Oliveira
Publikováno v:
SIBGRAPI
Texture mapping is an important technique to add visual detail to geometric models. As an alternative to traditional image-based texture mapping, procedural textures are described by a function, with interesting properties such as compact representat
Autor:
Marcelo Walter, Djalma Bandeira
Publikováno v:
SIBGRAPI
The modeling of weathering effects in still images is a powerful editing tool for many graphics applications. Although most of these effects can be generated by manually creating textures through graphics editing applications, performing such artist
Publikováno v:
SIBGRAPI
Patch-based texture synthesis builds a texture by joining together blocks of pixels — patches — of the original sample. Usually the best patches are selected among all possible using a L2 norm on the RGB or grayscale pixel values of boundary zone
Autor:
Leandro Tonietto, Marcelo Walter
Publikováno v:
SIBGRAPI
Image morphing has been extensively studied in computer graphics. Given two input images, morphing algorithms produce a sequence of inbetween images which transforms the source image into the target image in a visually pleasant way. We propose an alg
Autor:
Marcelo Walter, Leandro Tonietto
Publikováno v:
SIBGRAPI
New advances in image based texture synthesis techniques allow the generation of arbitrarily sized textures based on a small sample. The generated textures are perceived as very similar to the given sample. One main drawback of these techniques, howe