PROBLEM TO BE SOLVED: To provide an image processing system capable of acquiring a deep blood vessel emphasized image without using any special light source device.SOLUTION: An image processing system comprises: image data acquisition means for acquiring image data expressing a biological tissue photographed image； and YC separation treatment means for performing signal processing to produce a brightness signal and a color signal on the basis of the RGB signal of the image data. A ratio of an R component of the RGB signal included in the brightness signal is more than ratios of a G component and a B component.SELECTED DRAWING: Figure 2【課題】特殊な光源装置を使用することなく深部血管強調画像を取得可能とする。【解決手段】画像処理装置は、生体組織を撮影した画像を表す画像データを取得する画像データ取得手段と、画像データのＲＧＢ信号に基づいて輝度信号と色信号とを生成する信号処理を行うＹＣ分離処理手段と、を備え、輝度信号に含まれるＲＧＢ信号のＲ成分の割合が、Ｇ成分及びＢ成分のいずれの割合よりも多い。【選択図】図２
