Fig. 4From: Sparse representation utilizing tight frame for phase retrievalThe reconstructed “Fruits” images with 324 × 324 pixels. Top-row (left to right): a The original image. b The reconstructed image by HIO; Bottom row (left to right), the reconstructed images by: c RAAR-l 0. d RAAR-l 1. e PR-TIHP-l 1 Back to article page