PROBLEM TO BE SOLVED: To provide an image detection device and an image detection system capable of precisely detecting a shift vector between images of a subject projected with light having different spectral properties.SOLUTION: The present invention relates to an image detection device for performing a detection process on images of a subject captured at a timing in synchronization with the period in which the subject is cyclically projected with light having different spectral properties. The image detection device comprises shift vector detection means for detecting a shift vector of the subject based on the result of a comparison between an image of the subject captured in the present period and an image of the subject captured in a past period in which the subject was projected with light having the same spectral properties as in the present period.SELECTED DRAWING: Figure 4【課題】分光特性の異なる光で照射された被写体の画像間では、ずれベクトルを精度良く検出することができない。【解決手段】分光特性の異なる光で循環的に照射される被写体を該照射の周期と同期したタイミングで撮像したときに得られる、該被写体の画像に対する検出処理を行う画像検出装置を、現周期にて撮像された被写体の画像と、該現周期と同じ分光特性の光で照射された該被写体の過去の周期の画像との比較結果に基づいて、該被写体のずれベクトルを検出するずれベクトル検出手段を備える構成とする。【選択図】図４
