Variance Stabilization for Noisy+Estimate Combination in Iterative Poisson Denoising
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||5|
|Journal||IEEE Signal Processing Letters|
|Publication status||Published - 1 Aug 2016|
|Publication type||A1 Journal article-refereed|
We denoise Poisson images with an iterative algorithm that progressively improves the effectiveness of variance-stabilizing transformations (VST) for Gaussian denoising filters. At each iteration, a combination of the Poisson observations with the denoised estimate from the previous iteration is treated as scaled Poisson data and filtered through a VST scheme. Due to the slight mismatch between a true scaled Poisson distribution and this combination, a special exact unbiased inverse is designed. We present an implementation of this approach based on the BM3D Gaussian denoising filter. With a computational cost at worst twice that of the noniterative scheme, the proposed algorithm provides significantly better quality, particularly at low signal-to-noise ratio, outperforming much costlier state-of-the-art alternatives.
- Anscombe transformation, image denoising, iterative filtering, photon-limited imaging, Poisson noise