A first LED (14) in which the first emitted light amount decreases with an increase in the first cumulative lighting time； a second LED (15) in which the second emitted light amount decreases with an increase in the second cumulative lighting time； An image sensor (22) for imaging a subject irradiated with light from first and second LEDs (14, 15) of different colors and generating first and second video signals, and first and second cumulative lighting The first and second emitted light amounts are acquired based on the time, and the gain adjustment based on the emitted light amount ratio is performed on the first or second video signal, whereby the degree of deterioration of the first and second LEDs (14, 15). An imaging system comprising: a light emitting element deterioration degree correction unit in a video signal processing unit (17) that corrects a difference between the two.第１の累積点灯時間の増加に伴い第１の出射光量が低下する第１ＬＥＤ（１４）と、第２の累積点灯時間の増加に伴い第２の出射光量が低下する第２ＬＥＤ（１５）と、色が異なる第１，第２ＬＥＤ（１４，１５）から光が照射された被写体を撮像して第１および第２の映像信号を生成する撮像素子（２２）と、第１，第２の累積点灯時間に基づいて第１，第２の出射光量を取得し、出射光量比に基づくゲイン調整を第１または第２の映像信号に行うことにより、第１，第２ＬＥＤ（１４，１５）の劣化度の差を補正する映像信号処理部（１７）内の発光素子劣化度補正部と、を備えた撮像システム。
