“…The task is to recover the missing data on Ω\Λ. There are many methods to deal with this problem under many different settings, e.g., [3,4,10,25,38] for image inpainting, [11,14,15] for matrix completion, [29,55] for regression in machine learning, [8,9,20,23,24] for framelet-based image deblurring, [41,45] for surface reconstruction in computer graphics, and [16,22,26] for miscellaneous applications. We forgo to give a detailed survey on this fast developing area and the interested reader should consult the references mentioned above for the details.…”