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Definition
Image super-resolution (SR) problem is to reconstruct a high-resolution image from a given one or more low-resolution sample(s). While non-blind super-resolution methods assume that the exact formulation of the low-resolution image is known, blind algorithms are designed to handle arbitrary images from the real-world scenario.
Background
Digital images appear in various resolutions and may require resizing for specific purposes. For example, a thumbnail image in the PC browser is generated from a high-resolution counterpart. On the other hand, a low-resolution frame in a surveillance video should be enlarged to identify the suspect more accurately. Based on the sampling theory, the former can be effectively done by consecutive low-pass filtering and subsampling. However, the latter is an ill-posed problem since we have to reconstruct the missing...
References
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Son, S., Lee, K.M. (2021). Image Super-Resolution. In: Computer Vision. Springer, Cham. https://doi.org/10.1007/978-3-030-03243-2_838-1
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DOI: https://doi.org/10.1007/978-3-030-03243-2_838-1
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