Computational Photography Using a Pair of Flash/No-flash Images by Iterative Guided Filtering
نویسندگان
چکیده
In this paper, we present an iterative improvement of the guided image filter for flash/no-flash photography. The guided filter [8] utilizes a guide image to enhance a corrupted input image as similarly done in the joint bilateral filter [3, 12]. The guided filter has proved to be effective for such applications as high dynamic range compression, image matting, haze removal, and flash/no-flash denoising etc. In this paper, we analyze the spectral behavior of the guided filter kernel in matrix formulation and introduce a novel iterative application of the guided filtering which significantly improves it. Iterations of the proposed method consist of a combination of diffusion and residual iterations. We demonstrate that the proposed approach outperforms state of the art methods in both flash/no-flash image denoising and deblurring.
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