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A method of color filter array interpolation with alias cancellation properties

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3 Author(s)
Glotzbach, J.W. ; Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA ; Schafer, R.W. ; Illgner, K.

Digital still cameras use a single charge-coupled device (CCD) sensor array and a color filter array (CFA) to sample a full-color image. Thus, the measured image is an interleaving of the subsampled red, green, and blue images. The red and blue images are sampled at a lower rate, so if standard interpolation techniques are used, the reconstructed red and blue images will be missing some high-frequency information and could contain distortions from aliasing. This paper proposes a method of CFA interpolation that combines information from the green image with the subsampled red and blue images to attack these problems. The green high-frequency information is added to the interpolated red and blue images to increase the sharpness of the output and is also used to estimate the aliasing in the interpolated red and blue images, providing a means of reducing the appearance of the aliasing distortions

Published in:

Image Processing, 2001. Proceedings. 2001 International Conference on  (Volume:1 )

Date of Conference:

2001

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