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VERSION:2.0
PRODID:Linklings LLC
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TZID:Asia/Seoul
X-LIC-LOCATION:Asia/Seoul
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TZOFFSETFROM:+0900
TZOFFSETTO:+0900
TZNAME:KST
DTSTART:18871231T000000
DTSTART:19881009T020000
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BEGIN:VEVENT
DTSTAMP:20230103T035311Z
LOCATION:Room 323\, Level 3\, West Wing
DTSTART;TZID=Asia/Seoul:20221208T111200
DTEND;TZID=Asia/Seoul:20221208T112400
UID:siggraphasia_SIGGRAPH Asia 2022_sess257_gp_136@linklings.com
SUMMARY:Dynamic Projection Mapping for Robust Sphere Posture Tracking Usin
 g Uniform/Biased Circumferential Markers
DESCRIPTION:Talks\n\nDynamic Projection Mapping for Robust Sphere Posture 
 Tracking Using Uniform/Biased Circumferential Markers\n\nMikawa\n\nIn spat
 ial augmented reality (SAR), a widely dynamic projection mapping system ha
 s been developed as a novel approach to graphics presentation for widely m
 oving objects in dynamic situations. However, this approach requires a nov
 el high-speed tracking marker that enables automatic initialization as wel
 l as begin resistant to random occlusion, out-of-focus blurring, and low r
 esolution, which conventional markers of complicated shapes have not achie
 ved. \nThis talk focuses on a sphere as a widely moving target object for 
 a usage in dynamic sports. Then, I present a circumferential marker that c
 an be put on the surface of a sphere; circular shape becomes an ellipse in
  the perspective projection and can express geometric clues for effective 
 posture estimation. The usage of multiple circles has positive impact on e
 stimation accuracy and speed though the tracking of an ellipse itself havi
 ng as many as five parameters is usually unstable. Two-type circumferentia
 l markers are introduced here; one is uniform one that enables stable trac
 king for only relative posture, and the other is biased one that expresses
  codes by shifting the outside circle against inside one for absolute post
 ure estimation. As well as marker design, a novel high-speed algorithm to 
 identify them in the initial frame and track them continuously is also pro
 posed. \n\nThe evaluation experiment exhibited sufficient tracking speed a
 nd accuracy as well as robustness against blurring and occlusion compared 
 to conventional dot-based markers. Several demonstrations show realistic a
 pplications, such as real-time rotation visualization onto the sphere surf
 ace for sports training and advanced performance with sticky projection ma
 pping on a large stage.\n\nRegistration Category: FULL ACCESS, EXPERIENCE 
 PLUS ACCESS, TRADE EXHIBITOR\n\nLanguage: ENGLISH\n\nFormat: IN-PERSON
URL:https://sa2022.siggraph.org/en/full-program/?id=gp_136&sess=sess257
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