High Order Extrapolation Using Taylor Series for Color Filter Array Demosaicing

Color Filter Array Demosaicking Using High-Order Interpolation Techniques With a Weighted Median Filter for Sharp Color Edge Preservation

“…In Tables I and II, our methods were ranked the best for the majority of the test images, or otherwise our methods were ranked at least second best. In comparing the results of the methods in [17] and [22] with our proposed corresponding methods in this paper, this demonstrates that the weighted median filter is a superior classifier. Fig.…”

“…To assess the performance of our proposed methods, namely high order interpolation (WM-HOI), high order extrapolation (WM-HOX), and cubic spline interpolation (WM-CSI) with weighted median filters, we compared them to other prominent demosaicking techniques, namely bilinear interpolation, Freeman's method [7], Kimmel's method [12], Hamilton's method [9], Lu&Tan's method [23], Gunturk's method [8], Plataniotis' method [25], Hirakawa's method [11], Li's method [16], Li&Randhawa's high-order extrapolation (M-HOX) [17], and Li&Randhawa's Cubic Spline Interpolation (CSI) [22]. The difference between the M-HOX method in [17] and our proposed WM-HOX described in this paper is that the former method uses a median filter while the latter uses a weighted median filter as the classifier.…”

“…The difference between the M-HOX method in [17] and our proposed WM-HOX described in this paper is that the former method uses a median filter while the latter uses a weighted median filter as the classifier. Our proposed WM-CSI method in this paper adopts a different approach to that of the CSI method in [22].…”

“…In this section, we describe a high-order extrapolation method with high accuracy to determine four directional estimates of the missing color pixel [17]- [21], [28]. Each of the directional estimates is obtained by exploiting the spectral correlations among neighboring pixels along that particular direction.…”

Adaptive Colour Filter Array (CFA) Demosaicking with Mixed Order of Approximation

“…Similarly for a '0' in the orientation matrix, we interpolate along the horizontal direction. The extrapolation equations for the determination of the B. Adaptive Algorithm missing green colour ( GX ) using samples from its right-hand side (RHS) for the zero, first and second order are given in In order to determine the order of extrapolation, an indicator (la), (2a) and (3a) respectively [7]. Similarly, equations can of colour edge occurrence is proposed as follows.…”