Superresolution generally refers to the ability to image beyond the expected the resolution set by nature on the sensor diffraction limit. In recent years, this limit has been pushed back by either manipulating light in a controlled or uncontrolled way or by assuming something (sparsity) about the signal to be image.- The controlled way where one builds a material called metamaterial between the sensor and the object. This metamaterial will bend light rays. This metamaterials has a negative refraction index
- The uncontrolled way where bending of light is performed either using turbulence or gravity.
- And then there is the assumption made on the image (prior). One can either use several shots to "average" to the object of interest or one can use compressed sensing in random lens imaging.
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