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A 2D stochastic model of a phase-detection autofocus is proposed. A comprehensive analysis of its formal properties is conducted and its validity for a wide class of stochastic processes is proved. Moreover, formal properties of the phase-detection autofocus are analysed, together with assumptions necessary for its unimodality. Lastly, practical experiments, incorporating thermographic camera, which...
In this paper we present a 2D stochastic model of a contrast detection autofocus, which is valid for a wide class of stochastic processes. We consider the influence of noise reduction on the focus measure function. Furthermore, we analyse formal properties of the presented autofocus algorithm along with assumptions, which have to be fulfilled by noise reduction methods.
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