Color imaging for digital cameras with a single CCD sensor

Usually there is only a single CCD sensor in digital still camera. The CCD data array is interpolated into R, G, B planes to construct a complete color image. The interpolation attenuates the high frequency signal of the image, so a sharpening filter is used to compensate for the effect of blur. Pixel artifacts like zipper effect etc. are introduced by the sharpening operation. This paper presents an even-number-size-mask band pass filter, which can restore the color image´s high frequency signal with no zipper effect. An image processing technique based on the compensation filter is proposed and experiments show satisfactory results