Fig. 7
From: Sparse representation utilizing tight frame for phase retrieval
The reconstructed “Lena” images with 294 × 294 pixels from the Gaussian noisy oversampled diffraction pattern. Top-row (left to right): a The original image. b The reconstructed image by OSS (R real = 0.094); bottom row (left to right), the reconstructed images by: c RAAR-l 0 (R real = 0.1846). d RAAR-l 1 (R real = 0.0473). e PR-TIHP-l 1 (R real = 0.0391)