Total-Variation正則化を用いたシャープニング-デモザイキング法

概要

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We previously presented a demosaicing method that simultaneously removes image blurs caused by optical low-pass filters used in digital color cameras with Bayer's-RGB color filter array. This sharpening-demosaicing method restores only spatial frequency components lower than the Nyquist frequency corresponding to the mosaicing pattern, but it often produces ringing artifacts near color edges. To overcome this problem, we added a new total-variation regularization-based super-resolution technique. We analyzed the effects of the added technique using the DFT method. We also created a false-color suppression method using the TV regularization. Simulation results show that the TV-regularization-based super-resolution technique effectively demosaics sharp color images while restoring sharp step-edges and without producing ringing artifacts near the edges.
2007-11-01