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請求項７または８記載の装置において、前記画像処理する手段が点または線そのものの画像情報および前記点または線の外側画像情報を用い、前記ある部位で低振幅な信号のみを平滑化する非線形フィルタ処理する手段であることを特徴とする電子画像補正装置。9. The non-linear filter according to claim 7, wherein said image processing means uses image information of a point or line itself and outside image information of said point or line, and smoothes only a low-amplitude signal at said certain part. An electronic image correction apparatus characterized by being a means for processing.