Eric ZarakovWhen an application demands high-quality color imaging, CCD sensors once were the only alternative, but this is no longer the case for certain applications. Foveon Inc. in Santa Clara, Calif., believes that the key to boosting color imaging capability is with a direct image sensor architecture, called X3, that can capture three colors at each pixel location. The sensor structure stacks three pixel sensors, or photodetectors, within a pixel location, each dedicated to capturing a different color -- red, green or blue. 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