Wavelet-based color filter array demosaicking

In this paper, a wavelet-based technique for the demosaicking of Color Filter Arrays (CFA) is proposed. Conventional demosaicking techniques perform interpolation of the missing pixels in the Y CrCb color space, where emphasis is put on an optimal interpolation of the luminance. We make advantage of this by merging the obtained luminance image with interpolated R,G and B images. The merging is performed in a multiresolution way, using the wavelet transform. This postprocessing technique is demonstrated to outperform traditional demosaicking interpolation techniques, visually as well as quantitatively, using two measures, the PSNR and E ab, which is a measure for the average color distance between original and demosaicked images in the CIELAB color space.

• Type: Conference
• Year: 2004
• Where: ICIP
• Authors: Jef Driesen, Paul Scheunders
• Keywords: Average Color Distance, CIELAB Color Space, Color Filter Arrays, Demosaicking Interpolation Techniques, ICIP 2004, Image Processing, Techniques Perform Interpolation