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How size and relative contrast can improve specular highlight detection

Ana Stojkovic (UGent) , Jan Aelterman (UGent) , Hiep Luong (UGent) , Hans Van Parys, Ljubomir Jovanov (UGent) and Wilfried Philips (UGent)
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Abstract
Since specular highlights detection (SHD) is an important part of the LDR (low dynamic range) to HDR (high dynamic range) conversion pipeline, we propose two novel features for improving this detection for cinematic imagery. First, we introduce a feature that relates the size of the region covered with the potential specular highlight, relatively to the size of the objects in the surrounding area. This feature facilitates the analysis of complex scene arrangements by exploiting the observation that specular highlights make up a small area of a reflecting (Lambertian) surface in everyday objects. Secondly, we introduce a feature that expresses the relative contrast of the potential specular highlights within its local context. This allows detection of specular highlights that are not necessarily the absolute brightest parts of a scene. Qualitative and quantitative evaluation, by using a simple framework for SHD, demonstrate that these features are advantageous in SHD and can be used to improve this detection for cinematic content.
Keywords
specular highlights detection, high dynamic range expansion, inverse tone mapping, REFLECTION COMPONENTS, REMOVAL, SEPARATION, COLOR

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MLA
Stojkovic, Ana et al. “How Size and Relative Contrast Can Improve Specular Highlight Detection.” 2018 14th International Conference on Signal-image Technology and Internet-based Systems (SITIS). Ed. GS Di Baja et al. New York, NY, USA: IEEE, 2018. 258–265. Print.
APA
Stojkovic, A., Aelterman, J., Luong, H., Van Parys, H., Jovanov, L., & Philips, W. (2018). How size and relative contrast can improve specular highlight detection. In G. Di Baja, L. Gallo, K. Yetongnon, A. Dipanda, M. Castrillon Santana, & R. Chbeir (Eds.), 2018 14th International conference on signal-image technology and internet-based systems (SITIS) (pp. 258–265). Presented at the 14th International conference on Signal-Image Technology and Internet-Based Systems (SITIS 2018), New York, NY, USA: IEEE.
Chicago author-date
Stojkovic, Ana, Jan Aelterman, Hiep Luong, Hans Van Parys, Ljubomir Jovanov, and Wilfried Philips. 2018. “How Size and Relative Contrast Can Improve Specular Highlight Detection.” In 2018 14th International Conference on Signal-image Technology and Internet-based Systems (SITIS), ed. GS Di Baja, L Gallo, K Yetongnon, A Dipanda, M Castrillon Santana, and R Chbeir, 258–265. New York, NY, USA: IEEE.
Chicago author-date (all authors)
Stojkovic, Ana, Jan Aelterman, Hiep Luong, Hans Van Parys, Ljubomir Jovanov, and Wilfried Philips. 2018. “How Size and Relative Contrast Can Improve Specular Highlight Detection.” In 2018 14th International Conference on Signal-image Technology and Internet-based Systems (SITIS), ed. GS Di Baja, L Gallo, K Yetongnon, A Dipanda, M Castrillon Santana, and R Chbeir, 258–265. New York, NY, USA: IEEE.
Vancouver
1.
Stojkovic A, Aelterman J, Luong H, Van Parys H, Jovanov L, Philips W. How size and relative contrast can improve specular highlight detection. In: Di Baja G, Gallo L, Yetongnon K, Dipanda A, Castrillon Santana M, Chbeir R, editors. 2018 14th International conference on signal-image technology and internet-based systems (SITIS). New York, NY, USA: IEEE; 2018. p. 258–65.
IEEE
[1]
A. Stojkovic, J. Aelterman, H. Luong, H. Van Parys, L. Jovanov, and W. Philips, “How size and relative contrast can improve specular highlight detection,” in 2018 14th International conference on signal-image technology and internet-based systems (SITIS), Las Palmas de Gran Canaria, Spain, 2018, pp. 258–265.
@inproceedings{8582998,
  abstract     = {Since specular highlights detection (SHD) is an important part of the LDR (low dynamic range) to HDR (high dynamic range) conversion pipeline, we propose two novel features for improving this detection for cinematic imagery. First, we introduce a feature that relates the size of the region covered with the potential specular highlight, relatively to the size of the objects in the surrounding area. This feature facilitates the analysis of complex scene arrangements by exploiting the observation that specular highlights make up a small area of a reflecting (Lambertian) surface in everyday objects. Secondly, we introduce a feature that expresses the relative contrast of the potential specular highlights within its local context. This allows detection of specular highlights that are not necessarily the absolute brightest parts of a scene. Qualitative and quantitative evaluation, by using a simple framework for SHD, demonstrate that these features are advantageous in SHD and can be used to improve this detection for cinematic content.},
  author       = {Stojkovic, Ana and Aelterman, Jan and Luong, Hiep and Van Parys, Hans and Jovanov, Ljubomir and Philips, Wilfried},
  booktitle    = {2018 14th International conference on signal-image technology and internet-based systems (SITIS)},
  editor       = {Di Baja, GS and Gallo, L and Yetongnon, K and Dipanda, A and Castrillon Santana, M and Chbeir, R},
  isbn         = {9781538693858},
  keywords     = {specular highlights detection,high dynamic range expansion,inverse tone mapping,REFLECTION COMPONENTS,REMOVAL,SEPARATION,COLOR},
  language     = {eng},
  location     = {Las Palmas de Gran Canaria, Spain},
  pages        = {258--265},
  publisher    = {IEEE},
  title        = {How size and relative contrast can improve specular highlight detection},
  url          = {http://dx.doi.org/10.1109/SITIS.2018.00047},
  year         = {2018},
}

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