blue but does not sense the level of light in the other two primary color bands the interpolator 58 estimates the missing color levels for the site 51 by using the outputs of pixel cells 52 in adjacent photosensitive sites 51 that are sensing these color levels the photosensitive sites 51 and corresponding pixel cells 52 are arranged in a rectangular array of rows and columns to estimate the missing color levels for a given photosensitive site 51 i e to estimate the color levels not sensed by the site 51 the interpolator 58 may be configured to use pixel cells 52 in the same row same column or both e g the interpolator 58 may use a block of pixel cells 52 that surround the given photosensitive site 51 although many configurations are possible as discussed below a multi band column oriented filter pattern see fig2 is assumed and pixel cells 52 from the same row are used in the interpolation fig6 shows analog conditioning circuitry 54 to perform correlated double sampling of the analog outputs of the pixel cells 52 and provide gain control this circuitry receives the analog outputs of the pixel cells 52 the circuitry 54 furnishes its output to an analog to digital converter 56 which converts the analog outputs of the pixel cells 52 into digital data and supplies the digital data to the interpolator 58 after an integration interval has.