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Volume: 51 | Article ID: art00010
Color Shift Model-Based Segmentation and Fusion for Digital Autofocusing
  DOI :  10.2352/J.ImagingSci.Technol.(2007)51:4(368)  Published OnlineJuly 2007

This paper proposes a novel color shift model-based segmentation and fusion algorithm for digital autofocusing of color images. The source images are obtained using new multiple filter-aperture configurations. We shift color channels to change the focal point of the given image at different locations. For each respective location we then select the optimal focus information and, finally, use soft decision fusion and blending (SDFB) to obtain fully-focused images. The proposed autofocusing algorithm consists of: (i) color channel shifting and alignment for varying focal positions; (ii) optimal focus region selection and segmentation using sum modified Laplacian (SML); and (iii) SDFB, which enables smooth transition across region boundaries. By utilizing segmented images for different focal point locations, the SDFB algorithm can combine images with multiple, out-of-focus objects. Experimental results show performance and feasibility of the proposed algorithm for autofocusing images with one or more differently out-of-focus objects.

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Vivek Maik, Dohee Cho, Jeongho Shin, Donghwan Har, Joonki Paik, "Color Shift Model-Based Segmentation and Fusion for Digital Autofocusingin Journal of Imaging Science and Technology,  2007,  pp 368 - 379,

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Copyright © Society for Imaging Science and Technology 2007
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