Patent ID: 7990445

Claim:
An image sensor, comprising: an array of photosensitive elements formed using a semiconductor substrate, wherein each photosensitive element optically communicates with a unique portion of a filter, wherein the photosensitive elements have a frequency sensitivity band that provides a lowered response to incident light of a region of frequencies relative to other frequencies in the frequency sensitivity band of the photosensitive elements, and wherein the array comprises a plurality of unit matrixes, wherein each unit matrix comprises: a first filter, a second filter, and a third filter, wherein each filter provides a filter function that is substantially different than the filter functions of the other filters; and a fourth filter that provides a filter function that is substantially equal to one of the first, second, or third filters, and wherein the fourth filter passes light in a lowest response frequency sensitivity band of the first, second, and third filters and wherein the lowest response frequency sensitivity band corresponds to the region of frequencies to which the photosensitive elements have the lowered response to the incident light.