Image processing device, non-capture color signal calculating device, and image processing method

An image processing device for obtaining images from an image capture device in which photoelectric transducers are arranged in a two-dimensional plane, each of the photoelectric transducers having a spectral sensitivity curve selected from a group of N spectral sensitivity curves, each of the N spectral sensitivity curves corresponding to one of a group of N colors, the group of N spectral sensitivity curves including H-th and J-th spectral sensitivity curves that correspond to H-th and J-th colors, respectively, the image processing device comprising:

• a first calculation circuit for calculating a first H-th non-capture color signal corresponding to a pixel of interest, the pixel of interest corresponding to a position in the two-dimensional plane at which is located a photoelectric transducer having the J-th spectral sensitivity curve, based on capture color signals for pixels surrounding the pixel of interest that are outputted from those photoelectric transducers having the H-th spectral sensitivity curve;
• a second calculation circuit for calculating a second H-th non-capture color signal corresponding to the pixel of interest by:
• calculating a J-th average capture color signal at the pixel of interest, and
• multiplying a signal for the J-th color captured at the pixel of interest by a ratio of the first H-th non-capture color signal from the first calculation circuit to the J-th average capture color signal corresponding to the pixel of interest;
• and
• a third calculation circuit for calculating a third H-th non-capture color signal corresponding to an interpolation of the H-th color for the pixel of interest using the first H-th non-capture color signal from the first calculation circuit and the second H-th non-capture color signal from the second calculation circuit.