Endoscope apparatus and image acquisition method of the endoscope apparatus

A method of obtaining an image of an endoscope apparatus, the method comprising:

• illuminating a cavity by selectively providing light of a plurality of narrow bands of different wavelength bands including a near infrared band and white visible light to the cavity;
• generating an image signal with respect to the plurality of different wavelength bands by receiving light reflected by the cavity;
• generating a color image and a plurality of narrow band images from image signals with respect to the plurality of different wavelength bands;
• and
• generating additional narrow band images by fusing the color image and the plurality of narrow band images.

An endoscope apparatus comprising:

• an illumination unit configured to emit light including red, green and blue bands and near infrared band;
• a sensing unit configured to receive the light via at least one photodetection pixel, each including one sub-pixel corresponding to each one of the bands of the light;
• and
• an image processing unit configured to generate an image based on the received light.