A first image sensor receiving light from a subject and a second image sensor capable of receiving light of the same image as the first image sensor and having a spectral sensitivity characteristic different from that of the first image sensor are provided. A color-correcting coefficient determining part calculates, based on each output value photoelectrically converted in the first and the second image sensors, a color-correcting coefficient with which a color-correcting part performs color correction on the output value of the first image sensor. Using the first and the second image sensors of different spectral sensitivity characteristics, parameters for receiving/recognizing light from a subject field can be easily increased to obtain a favorable color reproduction characteristic. Since applying the image-processing device to a conventional electronic camera including the first and second image sensors only requires a change in signal-processing method, it can be easily applied to an existing electronic camera.