Since the cost of a digital camera rapidly increases based on its optical zooming capabilities, to keep it at a reasonable level, camera manufacturers produce cameras capable of performing digital zooming [1], [2], [3]. This is especially important for cost-effective, imaging-enabled, consumer electronic devices, such as mobiles phones and wireless personal digital assistants (PDAs). In such a single-sensor device, camera image zooming can be performed before or after the demosaicking step [3]. Unlike color (demosaicked) image zooming by zooming on the CFA image directly the designers avoid processing recovered RGB vectors where imperfections or noise introduced during demosaicking may create visual impairments [1], [2], [3]. A zooming solution operating on a gray-scale CFA sensor image generates an enlarged gray-scale, mosaic-like, image ( Figures 1 Figures 2).

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