PROBLEM TO BE SOLVED: To provide an endoscope system capable of acquiring biological numeric information of high objectivity without depending upon an illumination condition nor a photographing condition, and the operation method thereof.SOLUTION: A first still picture acquisition instruction is generated by a depression operation of a freeze button 13b. The light emission amount of illumination light emitted during the first still picture acquisition instruction is stored in a light emission amount storage part 24. The illumination light is emitted on the basis of the light emission amount stored in the light emission amount storage part 24. Brightness information is calculated from an image signal obtained by imaging an observation object. An image control part 70 performs at least one between display control of a monitor 18 and control of a second still picture acquisition instruction to be performed after the first still picture acquisition instruction on the basis of the brightness information.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】照明条件や撮影条件によらず、客観性の高い生体数値情報を取得することができる内視鏡システム及びその作動方法を提供する。【解決手段】フリーズボタン13bの押圧操作により、第1の静止画取得指示が発せられる。この第1の静止画取得指示のときに発光した照明光の発光量は、発光量記憶部24に記憶される。発光量記憶部24に記憶した発光量に基づいて、照明光の発光を行う。観察対象を撮像して得られた画像信号から、明るさ情報を算出する。画像制御部70は、明るさ情報に基づいて、モニタ18の表示制御、又は第1の静止画取得指示の後に行われる第2の静止画取得指示の制御のうち少なくとも一方を行う。【選択図】図2
