Soft Shadow Art
| dc.contributor.author | Min, Sehee | en_US |
| dc.contributor.author | Lee, Jaedong | en_US |
| dc.contributor.author | Won, Jungdam | en_US |
| dc.contributor.author | Lee, Jehee | en_US |
| dc.contributor.editor | Holger Winnemoeller and Lyn Bartram | en_US |
| dc.date.accessioned | 2017-10-18T08:18:32Z | |
| dc.date.available | 2017-10-18T08:18:32Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | Shadow 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.sectionheaders | 3D (The Third Dimension) | |
| dc.description.seriesinformation | Computational Aesthetics | |
| dc.identifier.doi | 10.1145/3092912.3092915 | |
| dc.identifier.isbn | 978-1-4503-5080-8 | |
| dc.identifier.issn | 1816-0859 | |
| dc.identifier.uri | https://doi.org/10.1145/3092912.3092915 | |
| dc.identifier.uri | https://diglib.eg.org:443/handle/10.2312/cae2017a03 | |
| dc.publisher | Association for Computing Machinery, Inc (ACM) | en_US |
| dc.subject | Computing methodologies Ray tracing | |
| dc.subject | Non photorealistic rendering | |
| dc.subject | Visibility | |
| dc.subject | Image Synthesis | |
| dc.subject | So Shadow Art | |
| dc.subject | Penumbra Image | |
| dc.subject | 3D Printing | |
| dc.title | Soft Shadow Art | en_US |