IEEE Trans Image Process - Generation of all-in-focus images by noise-robust selective fusion of limited depth-of-field images.

Tópicos

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Resumo

The limited depth-of-field of some cameras prevents them from capturing perfectly focused images when the imaged scene covers a large distance range. In order to compensate for this problem, image fusion has been exploited for combining images captured with different camera settings, thus yielding a higher quality all-in-focus image. Since most current approaches for image fusion rely on maximizing the spatial frequency of the composed image, the fusion process is sensitive to noise. In this paper, a new algorithm for computing the all-in-focus image from a sequence of images captured with a low depth-of-field camera is presented. The proposed approach adaptively fuses the different frames of the focus sequence in order to reduce noise while preserving image features. The algorithm consists of three stages: 1) focus measure; 2) selectivity measure; 3) and image fusion. An extensive set of experimental tests has been carried out in order to compare the proposed algorithm with state-of-the-art all-in-focus methods using both synthetic and real sequences. The obtained results show the advantages of the proposed scheme even for high levels of noise.

Resumo Limpo

limit depthoffield camera prevent captur perfect focus imag imag scene cover larg distanc rang order compens problem imag fusion exploit combin imag captur differ camera set thus yield higher qualiti allinfocus imag sinc current approach imag fusion reli maxim spatial frequenc compos imag fusion process sensit nois paper new algorithm comput allinfocus imag sequenc imag captur low depthoffield camera present propos approach adapt fuse differ frame focus sequenc order reduc nois preserv imag featur algorithm consist three stage focus measur select measur imag fusion extens set experiment test carri order compar propos algorithm stateoftheart allinfocus method use synthet real sequenc obtain result show advantag propos scheme even high level nois

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