Patent ID: 7564497

Claim:
An electronic image pickup system comprising: an electronic image pickup device including a plurality of pixels having three or more different spectral characteristics to obtain a color image and provided for converting an image sensed by said pixels to an electric signal including luminance and color information and producing said electric signal, an image pickup optical system for producing chromatic aberrations and forming a subject image on the image pickup surface of said electronic image pickup device, a large luminance difference boundary detecting means for detecting a boundary where a luminance difference among certain adjacent pixels of said electronic image pickup device reaches or exceeds a certain level, and a signal processing means for electrically controlling said electric signal including luminance and color information in such a way as to reduce color flares due to said chromatic aberrations in the vicinity of said boundary including a certain or greater level of luminance difference when said certain or greater level of luminance difference is detected by said large luminance difference boundary detecting means; and wherein said image pickup optical system for producing chromatic aberrations satisfies the following condition (11): ( Lh−Ld )/F min ≧2 P (11) where P and F min are the minimum pixel pitch and minimum F-number for the electronic image pickup device, and Lh is the absolute value of spherical aberrations for a h-line (404.7 nm) marginal ray and Ld is the absolute value of spherical aberration for a d-line (587.56 nm) marginal ray when the F-number is F MIN .