PROBLEM TO BE SOLVED: To suppress the influence of a change in a feature amount, provide a quick response to an image change, enable reduction in a load of arithmetic processing, and realize stable image quality.SOLUTION: An image processing device for performing tone processing of an image comprises: an acquisition unit that acquires an image captured in time series a tone processing unit that sequentially performs tone processing of the image on the basis of an image processing condition for the image and an image processing condition calculation unit that, when a relative positional change between an irradiation field and an observation portion exceeds a predetermined range, analyzes the image in order to change the image processing condition, and calculates an image processing condition.COPYRIGHT: (C)2013,JPO&INPIT【課題】特徴量の変動の影響を抑制し、画像変化に対する応答性が早く、演算処理の負担軽減が可能であり、安定した画質を実現すること。【解決手段】画像の階調処理を行う画像処理装置は、時系列に撮像された画像を取得する取得部と、画像の画像処理条件に基づき、画像の階調処理を順次行う階調処理部と、照射野と観察部位の相対的な位置の変化が所定の範囲を超えた場合、画像処理条件を変更するために画像を解析して画像処理条件を算出する画像処理条件算出部と、を備える。【選択図】 図1
