PROBLEM TO BE SOLVED: To provide a control device of an endoscope, an endoscope device, a state identification method of an endoscope, and a state identification program of an endoscope capable of identifying whether an endoscope is in a use state or in a non-use state by simple processing.SOLUTION: A control device 2 of an endoscope 1 includes a normalization processing unit 44A for acquiring a first captured image signal and a second captured image signal output from an image pick-up device 23 with different imaging time points, and performing normalization processing for causing an average luminance value of the first captured image signal to coincide with an average luminance value of the second captured image signal for one or both of the first captured image signal and the second captured image signal, and a state identification unit 44B for recognizing whether the endoscope 1 is in a non-use state or in a use state on the basis of a luminance change in the first captured image signal and the second captured image signal after the normalization processing.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】内視鏡が使用状態と未使用状態のどちらにあるのかを簡易な処理にて識別することのできる内視鏡の制御装置、内視鏡装置、内視鏡の状態識別方法、及び内視鏡の状態識別プログラムを提供する。【解決手段】内視鏡１の制御装置２は、撮像素子２３から出力された撮像時点の異なる第一の撮像画像信号と第二の撮像画像信号を取得し、第一の撮像画像信号の平均輝度値と第二の撮像画像信号の平均輝度値とを一致させるための正規化処理を、第一の撮像画像信号と第二の撮像画像信号の一方又は両方に行う正規化処理部４４Ａと、正規化処理後の第一の撮像画像信号及び第二の撮像画像信号の輝度変化に基づいて、内視鏡１が未使用状態と使用状態のどちらにあるかを認識する状態識別部４４Ｂと、を備える。【選択図】図４
