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Analog image processing
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Analog image processing is the use of an optical computer to process physical, optical images[1] formed by light waves coming from an object, as opposed to the digital image processing[2] and its use of digital computers to process pixelated, digital images. Correspondingly, a range of digital image processing techniques possess direct physical analogs. For example, fast Fourier transform algorithms are commonly implemented in digital phase correlation and other digital image processing techniques.[3][4] These digital Fourier transforms can be considered to be the digitized approximation of methods utilizing Fourier transforming properties of an ideal lens.[5]
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