1. A chromatic aberration suppressor circuit for suppressing chromatic aberration which arises in a high-brightness portion of a subject, the circuit comprising: detection means for detecting a chromatic aberration portion from an image signal which pertains to the subject and is to undergo gamma correction; gamma correction means for subjecting the image signal to gamma correction; suppression means for suppressing a color component of the chromatic aberration portion, which has been detected by the detection means, in the image signal after having undergone gamma correction performed by the gamma correction means; and wherein the detection means detects the chromatic aberration portion on the basis of a G signal among an R signal, a G signal, and a B signal constituting the image signal that is to undergo gamma correction.