Imaging signal processing apparatus

An image signal processing apparatus comprising:

• a sensing section which includes two-dimensionally arranged red (R), green (G), and blue (B) pixels formed of photoelectric conversion elements which convert an image signal to a charge signal and R, G, B filters, respectively, and produces R, G, and B color signals of R, G, and B color components of the image signal;
• a first adding section which adds, while weighting pixels in a predetermined ratio, a color signal of a center pixel of a predetermined pixel arrangement within the two-dimensionally arranged pixels and color signals of a plurality of peripheral pixels surrounding the center pixel within the two-dimensionally arranged pixels to produce a first addition signal;
• a contour signal generating section which generates a contour signal from the G color signal;
• a second adding section which adds the contour signal generated by the contour signal generating section to the first addition signal produced by the first adding section to produce a second addition signal;
• a ratio coefficient calculation section which calculates a ratio coefficient of an average value of the R, G, and B color signals of the pixels in units of a color within the predetermined pixel arrangement to a sum-up value of the average values;
• and
• an RGB signal generating section which generates new R, G, and B signals using the ratio coefficients calculated by the ratio coefficient calculation section and the first or second addition signal.

An image signal processing apparatus comprising:

• a sensing section which includes two-dimensionally arranged red (R), green (G), and blue (B) pixels formed of photoelectric conversion elements which convert an image signal to a charge signal and R, G, B filters, respectively, and produces R, G, and B color signals of R, G, and B color components of the image signal;
• an adding section which adds, while weighting pixels in a predetermined ratio, a color signal of a center pixel of a predetermined pixel arrangement within the two-dimensionally arranged pixels and color signals of a plurality of peripheral pixels surrounding the center pixel within the two-dimensionally arranged pixels to produce an addition signal;
• a ratio coefficient calculation section which calculates a ratio coefficient of an average value of the R, G, and B color signals of the pixels in units of a color within the predetermined pixel arrangement to a sum-up value of the average values;
• and
• an RGB signal generating section which generates new R, G, and B signals using the ratio coefficients calculated by the ratio coefficient calculation section and the addition signal.