Exemplar-Based Portrait Photograph Enhancement as Informed by Portrait Paintings

This paper proposes an approach to enhance the regional contrasts in snap‐shot style portrait photographs by using pre‐modern portrait paintings as aesthetic exemplars. The example portrait painting is selected based on a comparison of the existing contrast properties of the painting with those of t...

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Veröffentlicht in:Computer graphics forum Jg. 33; H. 8; S. 38 - 51
Hauptverfasser: Zhang, Xiaoyan, Constable, Martin, Chan, Kap Luk
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford Blackwell Publishing Ltd 01.12.2014
Schlagworte:
[Computing Methodologies]: Computer graphics-Image manipulation
Analysis
Boundaries
Computer graphics
image manipulation
Mapping
Nonlinearity
Organizations
portrait painting
portrait photograph enhancement
portrait photograph enhancement, portrait painting
Regional
regional contrast
Studies
Transformations (mathematics)
ISSN:0167-7055, 1467-8659
Online-Zugang:Volltext
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Zusammenfassung:This paper proposes an approach to enhance the regional contrasts in snap‐shot style portrait photographs by using pre‐modern portrait paintings as aesthetic exemplars. The example portrait painting is selected based on a comparison of the existing contrast properties of the painting with those of the photograph. The contrast organization in the selected example painting is transferred to the photograph by mapping the inter‐ and intra‐regional contrasts of the regions, such as the face and skin areas of the foreground figure, the non‐face/skin part of the foreground and the background region. A piecewise non‐linear transformation curve is used to achieve the contrast mapping. Finally, the transition boundary between regions is smoothed to achieve the final results. The experimental results and user study demonstrate that, by using this proposed approach, the visual appeal of the portrait photographs is effectively improved, and the face and the figure become more salient. This paper proposes an approach to enhance the regional contrasts in snap‐shot style portrait photographs by using pre‐modern portrait paintings as aesthetic exemplars. The example portrait painting is selected based on a comparison of the existing contrast properties of the painting with those of the photograph. The contrast organization in the selected example painting is transferred to the photograph by mapping the inter‐ and intra‐regional contrasts of the regions, such as the face and skin areas of the foreground figure, the non‐face/skin part of the foreground, and the background region. A piecewise nonlinear transformation curve is used to achieve the contrast mapping.
Bibliographie:ArticleID:CGF12399
ark:/67375/WNG-9D2B514S-D
Figure S1: One example demonstrating that the performance of the proposed method depends on the segmentation accuracy. (a) Original photograph, (b) Detected face and skin areas in (a), (c) Result by proposed approach. Figure S2: (a) Reference paintings, (b) Original photographs, (c) Enhancement results. Figure S3: (a) Reference paintings, (b) Original photographs, (c) Enhancement results.
istex:190B106A77B9501982CA9E60EFC2E8D91DB192A0
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.12399