Relighting Hair in a Single Image

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  • 一枚の髪型画像における毛髪のリライティング(CGの基礎から応用,映像表現・芸術科学フォーラム2013)
  • 一枚の髪型画像における毛髪のリライティング
  • イチマイ ノ カミガタ ガゾウ ニ オケル モウハツ ノ リライティング

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Description

Simulating our own impression with a new hairstyle would be useful when we select a hairstyle. However, if we simply overlay a hairstyle image onto a facial image, the composited result looks unnatural due to the mismatching of lighting conditions between the facial and hair images. In this paper, we present a novel method for relighting hair in a single image to modify the lighting effect of hair. The proposed method estimates the reflectance of hair based on Kajiya-Kay model, which requires the three-dimensional vectors of hair directions. To obtain such hair directions, we first extract a two-dimensional vector field of hair direction from the input image, and then estimate three-dimensional hair directions as well as the light direction. Using this information, various relighting results can be obtained based on Kajiya-Kay model by changing the light color, direction and brightness.

Journal

  • ITE Technical Report

    ITE Technical Report 37.17 (0), 5-8, 2013

    The Institute of Image Information and Television Engineers

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