Advances in Computer Graphics and Computer Vision: - download pdf or read online

By Marc Alexa, Andrew Nealen (auth.), José Braz, Alpesh Ranchordas, Helder Araújo, Joaquim Jorge (eds.)

This booklet contains chosen papers from the 1st overseas meetings on laptop imaginative and prescient idea and functions (VISAPP), and special effects thought and functions (GRAPP), together held in Setubal, Portugal, on February 25–28, 2006. We bought 314 paper submissions for either meetings, fairly a excessive quantity for a primary venue. We had contributions from forty four assorted nations overlaying all 5 continents, which confirms the good fortune and international succeed in of the 2 meetings. After a rigorous double-blind assessment, a complete of 116 submissions have been approved as complete papers. From these, this system Committee chosen 27 for ebook during this booklet, which have been then revised via the authors. exact thank you are because of all individuals and referees, with out whom this publication wouldn't have been attainable. VISAPP/GRAPP 2006 integrated 4 invited keynote lectures, offered by way of across the world famous researchers. The shows represented an enormous contribution to expanding the final caliber of the convention. we wish to specific our appreciation to all invited keynote audio system, in alphabetical order, Marc Alexa (TU Berlin/Germany), André Gagalowicz (INRIA/France), Ken Perlin (New York University/USA), Peter Robinson (University of Cambridge/UK), whose displays are in part incorporated within the first part of the ebook. the second one and 3rd sections comprise chosen papers from VISAPP 2006 and GRAPP 2006 respectively.

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Additional info for Advances in Computer Graphics and Computer Vision: International Conferences VISAPP and GRAPP 2006, Setúbal, Portugal, February 25-28, 2006, Revised Selected Papers

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Some editing results in Fig. 13 were obtained by using the silhouette editing capabilities of our system: sketching larger ears, opening the mouth and modifying the nose contour. 1 Geometry Adjustment Suppose we intend to create a potentially sharp feature where we have drawn our sketch onto the mesh. e. a ridge, ravine or crease) on a mesh, we must first adjust the mesh geometry to accommodate such a feature directly under the sketch, since in our setting the sketch need not run along an edge path of the mesh.

1999) uses a merge tree that is represented by a skip strip. For the original mesh a striptification is created, which is updated and repaired during traversal the strip. In addition, the generated triangle strips are scanned for redundant vertices before rendering. In (Stewart, 2001) an elegant and efficient algorithm for creating a striptifaction of a static mesh is proposed using a so called tunneling-operator. This operator connects previously given triangle strips iteratively to reduce their number.

The resulting edge path closely follows the sketch curve (Fig. 18(b)), yet may introduce badly shaped triangles. – Triangle shapes are improved by relaxing vertices close to the sketch so that their umbrella Laplacian equals the cotangent Laplacian (Eq. 19) in the least squares sense (See Fig. 19, right). For the vertex relaxation we must solve a linear system, much like the actual editing solver (Section 3), but with additional constraints given by Eq. 19. Obviously, the edge path vertices must remain under the sketch path during this procedure.

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