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Realistic image synthesis using photon mapping - …

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We took several reference images using a diginal camera, including target photos of wineglasses under various sunlight conditions. We also took extra background images to use with our rendered image. We even used a silver ball to attempt environment mapping. With a little creative placement of these images all around our subject and careful lighting placement, we were able to effective recreate our scene conditions under all transmission and refelctions directions in our glass. We used a silver ball and glass sphere as test objects to make sure all directions were decently represented in our test image. We also took time to accurately model a table surface for our glass with a realistic texture pulled from a Pergo web page and dailed in for proper illumination.

Realistic Image Synthesis Using Photon Mapping | …

To achieve this effect, we would like to implement the techniques described in Henrik Wann Jansen's paper "Efficient Simulation of Light Transport in Scenes with Participating Media using Photon Maps." Gummy Bears are a kind of participating media that will require light transport techniques not provided by PBRT, and photon mapping is very good at handling participating media in a manner that increases efficiency and reduces noise. We are also looking at the techniques described in Henrik's book "Realistic Image Synthesis Using Photon Mapping" regarding caustics photon mapping.

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Journal of Engineering Mechanics 140:11, download Realistic Image Synthesis Using Photon Mapping 2009 DNA diversity: sound.


The most challenging part of our project involved implementing the photon mapping algorithm as explained in Henrik Wann Jenson's excellent book, Realistic Image Synthesis Using Photon Mapping. After developing a general global photon map and a way of "painting" dots to demonstrate the placement of photons, we next worked on a separate caustic photon map to increase the resolution of the caustics generated by the glass that would be the centerpiece of our image. We did render a few Cornell Box-like test images to make sure our algorithm was working correctly. We also ended up finding a fiar amount of bugs in the LRT Path Tracing integrator in the process of exploring diffuse reflections with this box. We later realized that these diffuse reflections would add little to our particualr schene, and so built a modified Whittig ray tracer with photon mapping activated under the Monte Carlo heading to enable us to call either from RIB files.

Our final caustic map can be targeted using one or two ciircles specified in the photon mapping code. Samples are regularly generated over this area, bounced around according to a russian roulette system, and then stored in Jenson's photon map data structure. For the caustic photon map, we ony store photons from this target that hit specular surfaces on the first bounce. This gives us an excellent sample of the caustic genreating photons. Eventually, we also used the cognac glass data from Jensen's book make sure our glass model and photon map systems were working correctly.

realistic image synthesis using photon mapping | …

Realistic Image Synthesis Using Photon Mapping, 2nd Edition Henrik Wann Jensen Publisher: Taylor & Francis

Spatial frameworks: Concepts from Geodesy, Earth centered reference frames, Global and local horizontal datums, WGS 84,; Height references: Use of Physical and Geometric principles, Vertical datums and their relations, Ellipsoidal and Orthometric heights; Topographic surface modeling: Grid based models, TINs, Breaklines and Breakpoints, Surface interpolation methods; Photogrammetric data collection using Space borne and Airborne digital systems; Interferometric Synthetic Aperture Radar Concepts, Sensors, Data processing, Quality control; Airborne Lidar: Concepts, Sensors, Data Processing, Quality Control; DEM user applications; Terrain derivatives, Terrain Visualisation; Urban surface representation models, City GML standards; Spatial Data Infrastructure: Concepts and Examples; Examples of practical use of Spatial data Infrastructures.

Across disciplines, technologies and social sciences: Engaging on thinking how crossing disciplinary borders enables us to approach societal issues in a more comprehensive mode. What are the links between technologies and social sciences and how anthropology is fundamental to the social use of technologies?; Collaborative research: Introduction to methods incorporating different disciplines and distinct approaches, in order to organize research under different perspectives; A first approach to a village - its territory: Introductory fieldwork visits to the villages to be studied, in order to have a first sense of the realities we can observe. Under the notion of ‘territory’, we can start to discuss what happens in that place; Different layers of a map, mapping: Geography, urbanism, social and spatial structure’ – research on different subjects found in the villages where field work is done. How in the same place, a village, we find different realities and many topics to analyze, and how we can build different maps focusing on different aspects; Population, social world, social use of space: Engagement with ethnographic methods to discuss what are the meanings and contexts of the realities observed. Space and its use as translating the social universe of the studied villages; Constraints and problems, developmental matters: Observation and analysis of societal issues present in the villages - from water management to electrical connections, education, health or agricultural production. Cross these analyses with the discussions on ethnographic methodology to better understand the social and cultural contexts of the issues; Creative brainstorming – problems and solutions: Engaging with the recent anthropological research on infrastructure and development, in order to broaden a creative approach to the research projects using different media of registering and thinking: drawings, maps, photographs, film.

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  • Realisic Image Synthesis Using Photon Mapping

    Photon mapping - Wikipedia

  • Realistic Image Synthesis Using Photon Mapping, 2nd Edition

    15/07/2001 · Realistic Image Synthesis Using Photon Mapping has 26 ratings and 2 reviews

  • Realistic image synthesis using photon mapping jensen

    Get this from a library! Realistic image synthesis using photon mapping. [Henrik Wann Jensen]

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Realistic Image Synthesis Using Photon Mapping 2nd …

Physical Chemistry Experiments: Kinetics of Sucrose Inversion; Determination of unknown Concentration using UV Spectroscopy; Adsorption; Thermodynamics of charge transfer complexes; Electron transfer studies in Fe3+/Fe2+ system using electrochemical techniques; Interpretation of powder XRD pattern of some known oxide materials; Studying the photoelectric effect for the dual nature of the light; Elevation in boiling point to calculate the boiling point elevation constant; Calculating the distribution constant and/or equilibrium constant of I2 in aqueous medium; Sol-gel synthesis of SiO2 aerogels.

Realistic Image Synthesis Using Photon Mapping (2001)

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Realistic Image Synthesis Using Photon Mapping (0)

However, even without a final gather step it is possible to achieve images such as the one below. The image on the left shows the contribution from direct lighting only and the image on the right was rendered using photon mapping. The image on the right does not use a final gather step. Only 26,000 photons actually made it into the window and 500 were used in the radiance estimate. Notice the color bleeding on the yellow ball and on the floor.

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