NDLI: Joint Color Decrosstalk and Demosaicking for CFA Cameras

Content Provider	IEEE Xplore Digital Library
Author	Xiaolin Wu Xiangjun Zhang
Copyright Year	1992
Abstract	In interest of low cost, low power consumption, and compact size, most digital cameras adopt a design of single sensor array coupled with a color filter array. This design inevitably suffers, due to physical characteristics of the optical and semiconductor components and the imperfection of manufacturing, from the problem of crosstalk between different color channels. Channel crosstalk can desaturate colors and blur image details, but the problem was seemingly overlooked by existing color demosaicking algorithms. To rectify this deficiency we propose a new joint demosaicking and decrosstalk technique that counters the effects of channel crosstalks by adaptive least-squares inverse filtering. The new technique integrates the operations of deconvolution for crosstalk removal and interpolation for color demosaicking, and it introduces a general framework in which any spatially varying crosstalks and varying spatial-spectral correlations can be modeled and factored into the color reproduction. Simulation results show that the proposed technique is highly effective and capable to obtain both high color fidelity and sharp, clean spatial details.
Sponsorship	IEEE Signal Processing Society
Page Count	9
File Size	1328720
Starting Page	3181
Ending Page	3189
File Format	PDF
ISSN	10577149
Volume Number	19
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Crosstalk Optical filters Costs Energy consumption Digital cameras Sensor phenomena and characterization Digital filters Optical design Nonlinear optics image restoration Color crosstalk color demosaicking color filter array digital cameras
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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