Relighting with 4D incident light fields

  • Authors:
  • Vincent Masselus;Pieter Peers;Philip Dutré;Yves D. Willems

  • Affiliations:
  • Katholieke Universiteit Leuven;Katholieke Universiteit Leuven;Katholieke Universiteit Leuven;Katholieke Universiteit Leuven

  • Venue:
  • ACM SIGGRAPH 2003 Papers
  • Year:
  • 2003

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Abstract

We present an image-based technique to relight real objects illuminated by a 4D incident light field, representing the illumination of an environment. By exploiting the richness in angular and spatial variation of the light field, objects can be relit with a high degree of realism.We record photographs of an object, illuminated from various positions and directions, using a projector mounted on a gantry as a moving light source. The resulting basis images are used to create a subset of the full reflectance field of the object. Using this reflectance field, we can create an image of the object, relit with any incident light field and observed from a flxed camera position.To maintain acceptable recording times and reduce the amount of data, we propose an efficient data acquisition method.Since the object can be relit with a 4D incident light field, illumination effects encoded in the light field, such as shafts of shadow or spot light effects, can be realized.