Algorithms for Rendering Depth of Field Effects in Computer Graphics

Algorithms for Rendering Depth of Field Effects in Computer Graphics

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  Algorithms for Rendering Depthof Field Effects in Computer Graphics
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  TEAM Team member ATeam member B Team member C
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  Team member A
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  INTRODUCION Optical View PerfectFocus
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  Image Plane
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  3D scene representation blurred withthe aid of a depth map OVERVIEW Object Space methods Image Space methods
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  Team member B
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  OBJECT-SPACE APPROACHES 1. Distributed raytracing 2. Realistic camera models 3. Accumulation Buffer 4. Wave-Propagation Methods 5. Splatting 6. Analytical Visibility
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  OBJECT-SPACE APPROACHES These images areused as the "gold standard" to compare postprocessing techniques. with a thin lens camera model at first, distributed ray tracing was used; later, this technique was expanded to model particular real-world lenses. 1. Distributed ray tracing 2. Realistic camera models
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  OBJECT-SPACE APPROACHES A collection ofpinhole-based images is rendered, and the accumulation buffer is used to average those images We approach our scenario as a sizable cluster of point light sources, each of which emits a wavefront at a suitable wavelength. 3. Accumulation Buffer 4. Wave-Propagation Methods
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  OBJECT-SPACE APPROACHES A standard wayto render point-based scenes is elliptical weighted average splatting, which renders each point as an elliptical Gaussian. It works by increasing the width of the anti- aliasing filter for polygons that ought to be blurred. 5. Splatting 6. Analytical Visibility
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  Team member C
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  IMAGE-SPACE APPROACHE 1. Linear Filtering 2.Ray Distribution Buffer 3. Layered Depth of Field 4. Occlusion and Discretization 5. Vision Realistic Rendering 6. Importance Ordering 7. Perceptual Hybrid Method
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  IMAGE-SPACE APPROACHE 8. Repeated Convolution 9.Depth of Field on the GPU 10. Summed Area Table Method 11. Pyramidal Method 12. Separable Blur 13. Approaches Based on Simulated Heat Diffusion 14. Generalized and Semantic DoF 15. Light Fields
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  IMAGE-SPACE APPROACHE Linear filtering usesa spatially variant linear filter and a depth-dependent PSF. Ray Distribution is a replacement for the previous linear filtering method that explicitly handles visibility, thereby eliminating intensity leakage 1. Linear Filtering 2. Ray Distribution Buffer
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  IMAGE-SPACE APPROACHE Each layer isblurred by a different amount, using frequency domain convolution. Then, the blurred layers are composited with alpha blending The layers are placed uniformly in diopters Next, each pixel from the input image is placed in the layer whose depth is nearest to that pixel’s depth. 3. Layered Depth of Field 4. Occlusion and Discretization
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  IMAGE-SPACE APPROACHE data from awavefront aberrometer instrument is used to perform depth-of-field postprocessing s a Gaussian pyramid from the input image, pick a level based on the desired amount of blur and upsample that level by pushing it through the pyramid. 5. Vision Realistic Rendering 6. Perceptual Hybrid Method
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  Thank You Barsky, BrianA., and Todd J. Kosloff. "Algorithms for rendering depth of field effects in computer graphics." Proceedings of the 12th WSEAS international conference on Computers. Vol. 2008. World Scientific and Engineering Academy and Society (WSEAS), 2008.