International Journal of Optics / 2020 / Article / Fig 4

Research Article

Improved Error Reduction and Hybrid Input Output Algorithms for Phase Retrieval by including a Sparse Dictionary Learning-Based Inpainting Method

Figure 4

An example of applying the KSVD method to restore the damaged image. (a) Original image of the painting “Girl with a Pearl Earring” by Johannes Vermeer. (b) Damaged image containing 25% missing pixels has PSNR = 13.77 dB. (c) Reconstruction result using the KSVD method has PSNR = 31.56 dB. (d) The updated/learned dictionary. Each patch represents a column vector or an atom of the dictionary matrix .

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