Fig. 2From: Sparse representation utilizing tight frame for phase retrievalThe reconstructed “Lena” images by PR-TIHP-l 0 and PR-TIHP-l 1 with various oversampled factors and their corresponding non-negative support fields. “Lena” with 314 × 314 pixels (the first row, oversampled by the factor of 1.63), 316 × 316 pixels (the second row, oversampled by the factor of 1.62)Back to article page