Parameterized environment maps

Hakura, Ziyad S.; Snyder, John; Lengyel, Jerome Edward

doi:10.1145/364338.364402

Cited by 20 publications

(9 citation statements)

References 21 publications

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“…Real-time refraction mapping techniques were derived [LKM01] [Wym05] but they are limited to refraction for distant objects, which is a critical limitation of environment mapping. Hakura [HSL01] used a layered map to support local objects. Ohbuchi [Ohb03] realized a real-time method using refraction rays.…”

Section: Real-time Rendering With Refractionmentioning

confidence: 99%

Interactive Simulation of the Human Eye Depth of Field and Its Correction by Spectacle Lenses

Kakimoto¹,

Tatsukawa²,

Mukai³

et al. 2007

Computer Graphics Forum

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This paper describes a fast rendering algorithm for verification of spectacle lens design. Our method simulates refraction corrections of astigmatism as well as myopia or presbyopia. Refraction and defocus are the main issues in the simulation. For refraction, our proposed method uses per-vertex basis ray tracing which warps the environment map and produces a real-time refracted image which is subjectively as good as ray tracing. Conventional defocus simulation was previously done by distribution ray tracing and a real-time solution was impossible. We introduce the concept of a blur field, which we use to displace every vertex according to its position. The blurring information is precomputed as a set of field values distributed to voxels which are formed by evenly subdividing the perspective projected space. The field values can be determined by tracing a wavefront from each voxel through the lens and the eye, and by evaluating the spread of light at the retina considering the best human accommodation effort. The blur field is stored as texture data and referred to by the vertex shader that displaces each vertex. With an interactive frame rate, blending the multiple rendering results produces a blurred image comparable to distribution ray tracing output.

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Section: Real-time Rendering With Refractionmentioning

confidence: 99%

Interactive Simulation of the Human Eye Depth of Field and Its Correction by Spectacle Lenses

Kakimoto¹,

Tatsukawa²,

Mukai³

et al. 2007

Computer Graphics Forum

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“…Cabral et al [Cabral et al 1999] suggest using multiple 2D environment maps to obtain view-dependency. Hakura et al [Hakura et al 2001] proposed using location and view-dependent environment maps to capture local reflections. However, the transitions between different environment maps are difficult to control and may lead to discontinuity.…”

Section: View Pointmentioning

confidence: 99%

Real-time reflection mapping with parallax

Yang

McMillan

2005

Proceedings of the 2005 Symposium on Interactive 3D Graphics and Games

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Figure 1: Reflections on a moving sphere rendered using our method. Notice the change of parallax: the table is partially occluded by the green chair (left) and turns gradually visible (middle and right). AbstractWe present a novel algorithm to efficiently render accurate reflections on programmable graphics hardware. Our algorithm overcomes problems that commonly occur in environment mapping such as the lack of motion parallax and inaccuracies when objects are close to the reflectors. In place of a 2D environment map, which only represents points infinitely far away from the reflector, we use six 4D light field slabs to represent the surrounding scene. Each reflected ray is rendered by indexing into these precaptured environment light fields. We are able to render accurate reflections with motion parallax at interactive frame rates independent of the reflector geometry and the scene complexity. Furthermore, we can move the reflectors within a constrained region of space and guarantee that the environment light field provides the necessary rays. We benefit from the programmability of existing graphics hardware to efficiently compute the reflected rays and transform them into the appropriate light field index. We also take advantage of the large texture memories and memory bandwidth available in today's graphics card to store and query hardware-compressed light fields.

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“…Therefore, it is not adequate forthe rendering of reflections/refractions of objects near thewater surface. Hakura et al proposed an extended versionof the environment mapping techniques and displayed localreflections/refractions 7 . This method requires a sequenceof environment maps that are pre‐recorded over a selectionof viewpoints by ray tracing.…”

Section: 1 Related Workmentioning

confidence: 99%

A Fast Rendering Method for Refractive and Reflective Caustics Due to Water Surfaces

Iwasaki¹,

Dobashi²,

Nishita³

2003

Computer Graphics Forum

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In order to synthesize realistic images of scenes that include water surfaces, the rendering of optical effectscaused by waves on the water surface, such as caustics and reflection, is necessary. However, rendering causticsis quite complex and time‐consuming. In recent years, the performance of graphics hardware has made significantprogress. This fact encourages researchers to study the acceleration of realistic image synthesis. We present herea method for the fast rendering of refractive and reflective caustics due to water surfaces. In the proposed method,an object is expressed by a set of texture mapped slices. We calculate the intensities of the caustics on the objectby using the slices and store the intensities as textures. This makes it possible to render caustics at interactive rateby using graphics hardware. Moreover, we render objects that are reflected and refracted due to the water surfaceby using reflection/refraction mapping of these slices. Categories and Subject Descriptors (according to ACM CCS): I.3.1 [Computer Graphics]: Hardware Architecture I.3.7 [Computer Graphics]: Three‐Dimensional Graphics and Realism

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Parameterized environment maps

Cited by 20 publications

References 21 publications

Interactive Simulation of the Human Eye Depth of Field and Its Correction by Spectacle Lenses

Interactive Simulation of the Human Eye Depth of Field and Its Correction by Spectacle Lenses

Real-time reflection mapping with parallax

A Fast Rendering Method for Refractive and Reflective Caustics Due to Water Surfaces

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