COLOR IMAGE SAMPLING AND RECONSTRUCTION

摘要

An image capture apparatus that includes an array of color filters for green, red, and magenta colors arranged over a semiconductor substrate in the manner of a primary color Bayer pattern except a magenta color replaces the blue color. Light passing through the magenta color filter is integrated separately in a magenta pixel for a shallow photodiode signal and a deep photodiode signal in a first photodiode and a deeper second photodiode in the substrate, respectively. A mezzanine photodiode may be disposed between the first and second photodiodes and held at a fixed voltage level or reset multiple times during charge integration. A red pixel value for the magenta pixel is a function of the deep photodiode signal and an adjacent red pixel's red pixel signal. A minimum exists in its derivative with respect to the former at a value of the former that varies with the latter.

主权项

1. An image sensor pixel array supported by a semiconductor substrate of a first conductivity type, comprising:
a pair of green color filters arrayed in a first direction; a red color filter adjacent to both green color filters of the pair; and a magenta color filter adjacent to both green color filters of the pair and on an opposite side of the pair from the red color filter.