雙向光割技術(shù)在多光繪制中的應(yīng)用研究
[Abstract]:The multi-light method provides a very general framework for solving the global illumination problem, which enables us to use hundreds of thousands of virtual point light sources to draw various special effects. In a large set of virtual point light sources, the contribution of each virtual point light source is not equal. In general, scalable algorithms attempt to reduce computational complexity by exploiting the importance of this uneven distribution of virtual point light sources to identify and evaluate all important virtual point light sources. On the other hand, only sparse estimates are made for unimportant virtual point light sources. In order to efficiently collect the contribution estimates of these virtual point light sources, the optical cutting algorithm and its extension method cluster these virtual point light sources, and use representative classes to approximate represent the multi-light rendering matrix. On the basis of this, bidirectional optical cutting algorithm uses bidirectional frame and deeper view sub-path to extend the material which can be drawn based on virtual point light source. In this paper, a bidirectional optical cutting algorithm is implemented on Mitsubishi system, which can produce high gloss and high quality off-line images, and can give good consideration to the efficiency of program operation and the effect of drawing. First, we perform a general multi-optical initialization module to generate the required data. Then, we use the data structure of optical tree to cluster the generated virtual point light source, and for the multidimensional optical cutting integrator, we also need to cluster the virtual perceptron. The bidirectional optical cutting integrator adds the path sampling before the above operation to realize the expansion of the path of the virtual perceptron node and record the related information. Finally, we use the optical tree and the virtual perceptron node tree to divide the optical or multi-dimensional light cuts, and obtain the rendering results. At the end of the paper, we show the rendering effect of the integrator and analyze the experiment.
【學(xué)位授予單位】:浙江大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:TP391.41
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