Soft Shadow Art

dc.contributor.authorMin, Seheeen_US
dc.contributor.authorLee, Jaedongen_US
dc.contributor.authorWon, Jungdamen_US
dc.contributor.authorLee, Jeheeen_US
dc.contributor.editorHolger Winnemoeller and Lyn Bartramen_US
dc.date.accessioned2017-10-18T08:18:32Z
dc.date.available2017-10-18T08:18:32Z
dc.date.issued2017
dc.description.abstractShadow art is a form of sculptural art in which the con guration of lights and sculptures cast 2D shadows for artistic e ect. Previous computational methods for the creation of shadow art assumes a single point light that casts a bitonal shadow with sharp boundary. e goal of our study is to generate grayscale shadows using an area light (or an array of point lights) and multiple layers of occluder cells. e area light source casts so shadows consisting of penumbra and umbra. e penumbra is the region in which only a portion of the light source is obscured by the occluders and the umbra is the region where the light sources are completely blocked by the occluders. Th e key challenge is to nd the arrangement of the occluders such that each pixel in the shadow region gathers light from the partially occluded light source to yield a desired tone level. e problem can be formulated as combinatorial optimization with many binary variables. We present a stochastic algorithm that converges quickly to the target shadow image. Our algorithm generalizes easily to deal with arbitrary lighting and geometry setups. We demonstrate the potential of our system with a number of tonal images and the fabrication of artistic ornaments that cast grayscale shadows.en_US
dc.description.sectionheaders3D (The Third Dimension)
dc.description.seriesinformationComputational Aesthetics
dc.identifier.doi10.1145/3092912.3092915
dc.identifier.isbn978-1-4503-5080-8
dc.identifier.issn1816-0859
dc.identifier.urihttps://doi.org/10.1145/3092912.3092915
dc.identifier.urihttps://diglib.eg.org:443/handle/10.2312/cae2017a03
dc.publisherAssociation for Computing Machinery, Inc (ACM)en_US
dc.subjectComputing methodologies Ray tracing
dc.subjectNon photorealistic rendering
dc.subjectVisibility
dc.subjectImage Synthesis
dc.subjectSo Shadow Art
dc.subjectPenumbra Image
dc.subject3D Printing
dc.titleSoft Shadow Arten_US
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