Shadow Segmentation and Augmentation Using á-overlay Models that Account for Penumbra

Michael Nielsen, Claus B. Madsen

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskning

Resumé

This paper introduces a new concept within shadow segmentation. Previously, an image is considered to consist of shadow and non-shadow regions. Thus, a binary mask is estimated using various heuristics regarding structural and retinex/color constancy theories. We wish to model natural shadows so that an augmented virtual object can cast an exact shadow. The penumbras (half-shadows) must be taken into account so that we can model the soft shadows.We hope to achieve this by modelling the shadow regions (umbra and penumbra alike) with a transparent overlay. This paper reviews the state-of-the-art shadow theories and presents two overlay models. These are analyzed analytically in relation to color theory and tangibility.
OriginalsprogEngelsk
TitelProceedings fra den 15. Danske Konference i Mønstergenkendelse og Billedanalyse
RedaktørerSøren I. Olsen
Antal sider10
Forlag<Forlag uden navn>
Publikationsdato2006
Sider60-69
ISBN (Trykt)01078283
StatusUdgivet - 2006
BegivenhedDanske Konference i Mønstergenkendelse og Billedanalyse - København, Danmark
Varighed: 24 aug. 200625 aug. 2006
Konferencens nummer: 15

Konference

KonferenceDanske Konference i Mønstergenkendelse og Billedanalyse
Nummer15
LandDanmark
ByKøbenhavn
Periode24/08/200625/08/2006
NavnDIKU Technical Report
Nummer06/08

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Color
Masks

Citer dette

Nielsen, M., & Madsen, C. B. (2006). Shadow Segmentation and Augmentation Using á-overlay Models that Account for Penumbra. I S. I. Olsen (red.), Proceedings fra den 15. Danske Konference i Mønstergenkendelse og Billedanalyse (s. 60-69). <Forlag uden navn>. DIKU Technical Report, Nr. 06/08
Nielsen, Michael ; Madsen, Claus B. / Shadow Segmentation and Augmentation Using á-overlay Models that Account for Penumbra. Proceedings fra den 15. Danske Konference i Mønstergenkendelse og Billedanalyse. red. / Søren I. Olsen. <Forlag uden navn>, 2006. s. 60-69 (DIKU Technical Report; Nr. 06/08).
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abstract = "This paper introduces a new concept within shadow segmentation. Previously, an image is considered to consist of shadow and non-shadow regions. Thus, a binary mask is estimated using various heuristics regarding structural and retinex/color constancy theories. We wish to model natural shadows so that an augmented virtual object can cast an exact shadow. The penumbras (half-shadows) must be taken into account so that we can model the soft shadows.We hope to achieve this by modelling the shadow regions (umbra and penumbra alike) with a transparent overlay. This paper reviews the state-of-the-art shadow theories and presents two overlay models. These are analyzed analytically in relation to color theory and tangibility.",
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Nielsen, M & Madsen, CB 2006, Shadow Segmentation and Augmentation Using á-overlay Models that Account for Penumbra. i SI Olsen (red.), Proceedings fra den 15. Danske Konference i Mønstergenkendelse og Billedanalyse. <Forlag uden navn>, DIKU Technical Report, nr. 06/08, s. 60-69, Danske Konference i Mønstergenkendelse og Billedanalyse, København, Danmark, 24/08/2006.

Shadow Segmentation and Augmentation Using á-overlay Models that Account for Penumbra. / Nielsen, Michael; Madsen, Claus B.

Proceedings fra den 15. Danske Konference i Mønstergenkendelse og Billedanalyse. red. / Søren I. Olsen. <Forlag uden navn>, 2006. s. 60-69 (DIKU Technical Report; Nr. 06/08).

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskning

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Nielsen M, Madsen CB. Shadow Segmentation and Augmentation Using á-overlay Models that Account for Penumbra. I Olsen SI, red., Proceedings fra den 15. Danske Konference i Mønstergenkendelse og Billedanalyse. <Forlag uden navn>. 2006. s. 60-69. (DIKU Technical Report; Nr. 06/08).