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DTSTAMP:20240214T070244Z
LOCATION:Meeting Room C4.11\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231213T131500
DTEND;TZID=Australia/Melbourne:20231213T133000
UID:siggraphasia_SIGGRAPH Asia 2023_sess169_papers_105@linklings.com
SUMMARY:Computational Design of LEGO Sketch Art
DESCRIPTION:Technical Communications, Technical Papers, TOG\n\nMingjun Zho
 u (The Chinese University of Hong Kong); Jiahao Ge (The Chinese University
  of Hong Kong, Qianzhi Technology Inc.); Hao Xu (Qianzhi Technology Inc.);
  and Chi-Wing Fu (The Chinese University of Hong Kong)\n\nThis paper prese
 nts computational methods to aid the creation of LEGO Sketch models from s
 imple input images. Beyond conventional LEGO mosaics, we aim to improve th
 e expressiveness of LEGO models by utilizing LEGO tiles with sloping and r
 ounding edges, together with rectangular bricks, to reproduce smooth curve
 s and sharp features in the input. This is a challenging task, as we have 
 limited brick shapes to use and limited space to place bricks. Also, the s
 earch space is immense and combinatorial in nature. We approach the task b
 y decoupling the LEGO construction into two steps: first approximate the s
 hape with a LEGO-buildable contour then filling the contour polygon with L
 EGO bricks. Further, we formulate this contour approximation into a graph 
 optimization with our objective and constraints and effectively solve for 
 the contour polygon that best approximates the input shape. Further, we ex
 tend our optimization model to handle multi-color and multi-layer regions,
  and formulate a grid alignment process and various perceptual constraints
  to refine the results. We employ our method to create a large variety of 
 LEGO models and compare it with humans and baseline methods to manifest it
 s compelling quality and speed.\n\nRegistration Category: Full Access\n\nS
 ession Chair: Bernd Bickel (Institute of Science and Technology Austria, G
 oogle)
URL:https://asia.siggraph.org/2023/full-program?id=papers_105&sess=sess169
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