Color Filter Arrays Based on Mutually Exclusive Blue Noise Patterns

Color filter array design using random patterns with blue noise chromatic spectra

“…To our knowledge, only the work of Zhu and Parker has addressed the problem of designing random R, G, B patterns with blue noise characteristics, using blue noise masks thresholded at different levels [20]. A blue noise mask is a greyscale pattern which, when thresholded at any value T, provides a binary pattern with mean value T and approximate blue noise spectrum [21].…”

A new random color filter array with good spectral properties

“…This ensures that low-frequency content in the chrominance is avoided in an optimal way. To our knowledge, only the work of Zhu and Parker address the problem of designing random R,G,B patterns with blue noise characteristics, using blue noise masks thresholded at different levels [5]. This method does not yield patterns with good spectral characteristics, however: the small example [5, Fig.…”

“…[1,2,3]. Actually, very few works have addressed the design of new CFAs with improved performances over the Bayer CFA [4,5,6,16], known to yield moiré artifacts in certain conditions. In fact, whatever the CFA, aliasing in unavoidable, because of the intrinsic undersampling conditions of the acquisition.…”

A New Color Filter Array With Optimal Properties for Noiseless and Noisy Color Image Acquisition

“…Kodak patented new CFAs containing transparent (panchromatic) filters, in addition to R, G, B filters [3], [12]. Other CFAs have been proposed in the literature [4], [5], [13], [14]; some of these are compared in [15]. However, all these CFAs have been designed empirically and are not based on a thorough theory for CFA design.…”