A spatial post-processing algorithm for images of night scenes
Journal of Graphics Tools
A spectrum-based framework for realistic image synthesis
A spectrum-based framework for realistic image synthesis
Digital photography with flash and no-flash image pairs
ACM SIGGRAPH 2004 Papers
Visual Acuity in Day for Night
International Journal of Computer Vision
User-assisted intrinsic images
ACM SIGGRAPH Asia 2009 papers
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This paper presents a new spectrally-based single image relighting approach. We first compute the spectral radiance of each stimulus on the monitor when displaying the image and then approximate this radiance to the one produced by each corresponding point in the scene to compute spectral reflectance. Then we use the spectral power distribution (defined as SPD) of a new illuminant to relight the image. The key to our method is the use of the spectral radiance of the stimuli on the monitor to approximate that of the objects in the given image. Since a video can be treated as a series of images, we further extend our algorithm to nighttime effects simulation for daytime videos. Our method can also change the illuminant effects of a video.