A logarithmic-potential PDE iteration is claimed to restore uneven illumination with PSNR 52.90 dB, but the printed implementation and parameters make the update collapse to a no-op.
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An Iterative PDE Based Illumination Restoration Scheme for Image Enhancement
A logarithmic-potential PDE iteration is claimed to restore uneven illumination with PSNR 52.90 dB, but the printed implementation and parameters make the update collapse to a no-op.