Patent ID: 8094209
Filing Date: 2012-01-10
Classification: H04N

Abstract:
1. 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 color signals before being added by the first adding section; 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, and further comprising an amplitude emphasizing section which extracts a signal of a midrange frequency from the first addition signal and add the extracted signal to the first addition signal or subtract the extracted signal from the first addition signal to emphasize an amplitude of the first addition signal.