Real-time image-space outlining for non-photorealistic rendering

Mitchell, Jason L.; Brennan, Chris; Card, Drew

doi:10.1145/1242073.1242252

Cited by 23 publications

(7 citation statements)

References 2 publications

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“…they operate on the rendered image in the view plane. Some techniques also make use of the z ‐buffer to find relevant discontinuities [ST90, MBC02]. Object‐based methods , on the other hand, employ the geometry with their primitives, e.g.…”

Section: Low‐level Illustrative Visualization Techniquesmentioning

confidence: 99%

A Survey of Surface‐Based Illustrative Rendering for Visualization

Lawonn

Viola

Preim

et al. 2018

Computer Graphics Forum

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In this paper, we survey illustrative rendering techniques for 3D surface models. We first discuss the field of illustrative visualization in general and provide a new definition for this sub‐area of visualization. For the remainder of the survey, we then focus on surface‐based models. We start by briefly summarizing the differential geometry fundamental to many approaches and discuss additional general requirements for the underlying models and the methods' implementations. We then provide an overview of low‐level illustrative rendering techniques including sparse lines, stippling and hatching, and illustrative shading, connecting each of them to practical examples of visualization applications. We also mention evaluation approaches and list various application fields, before we close with a discussion of the state of the art and future work.

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Section: Low‐level Illustrative Visualization Techniquesmentioning

confidence: 99%

A Survey of Surface‐Based Illustrative Rendering for Visualization

Lawonn

Viola

Preim

et al. 2018

Computer Graphics Forum

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“…There was several research works to find an effective manner of detection the silhouette in real-time [8], [9], [10], [11], [12], although the majority of the algorithms require a pre-process of the geometry or multiple rendering passes [13]. In the preceding cases there is no support geometry underlying the silhouette.…”

Section: The Silhouettementioning

confidence: 99%

Shadow Volume in real-time rendering

Zerari

Babahenini

2011

2011 International Conference on Communications, Computing and Control Applications (CCCA)

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This paper presents an implementation of the algorithm of shadow volume, with an acceleration allowing a rendering in real-time. This technique is based on [1], which makes it possible to obtain shadow in real-time, where the computation of the silhouette requires the evaluation of the geometry by the CPU. By the use of the last version of the GPU, we propose to improve the computing times by using the geometry shaders so that the calculation of the silhouette is carried out by a GPU program. We present the step which allows us to lead to a concrete implementation of this algorithm, the modifications which were made, as well as a comparative study of results, followed by a discussion.

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“…Mitchell et al [2002] present a hardware-accelerated real-time image processing technique for extracting edges and enhancing images on a per-scene basis. Their technique renders fragment normals, z-values, and object identifiers of 3D geometry into textures using a render-to-texture implementation.…”

Section: Related Workmentioning

confidence: 99%

Sketchy drawings

Nienhaus

Döllner

2004

Proceedings of the 3rd International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa

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In non-photorealistic rendering sketchiness is essential to communicate visual ideas and can be used to illustrate drafts and concepts in, for instance, architecture and product design. In this paper, we present a hardware-accelerated real-time rendering algorithm for drawings that sketches visually important edges as well as inner color patches of arbitrary 3D objects even beyond the geometrical boundary. The algorithm preserves edges and color patches as intermediate rendering results using textures. To achieve sketchiness it applies uncertainty values in imagespace to perturb texture coordinates when accessing intermediate rendering results. The algorithm adjusts depth information derived from 3D objects to ensure visibility when composing sketchy drawings with arbitrary 3D scene contents. Rendering correct depth values while sketching edges and colors beyond the boundary of 3D objects is achieved by depth sprite rendering. Moreover, we maintain frame-to-frame coherence because consecutive uncertainty values have been determined by a Perlin noise function, so that they are correlated in image-space. Finally, we introduce a solution to control and predetermine sketchiness by preserving geometrical properties of 3D objects in order to calculate associated uncertainty values. This method significantly reduces the inherent shower-door effect.

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Real-time image-space outlining for non-photorealistic rendering

Cited by 23 publications

References 2 publications

A Survey of Surface‐Based Illustrative Rendering for Visualization

A Survey of Surface‐Based Illustrative Rendering for Visualization

Shadow Volume in real-time rendering

Sketchy drawings

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