not all interpolations work the same
the classic problem with interpolation is that the layout of a conventional ccd cannot average pixels effectively and still maintain natural looking images. a regular ccd looks something like a chess board. (square pixels stacked next to each other in a grid) when a camera tries to interpolate the image off this sensor, the algorythms have problems blending the colours (an area of blue next to an area of yellow will often interpolate to give a fine area of green between the two) the fuji cameras with the super ccd (fuji's brand name) use hexagonal pixels and interlock them like a brick wall to give superior performance when interpolating images. fuji claim that the process they utlise is not interpolation and in a way this is true, the sensor actually analyses the rate of change in the wavelength of light across the pixels to predict the wavelengths of light in areas of the sensor where there are no pixels. not really interpolation as the math is different but the same end result.