An image processing apparatus includes: a first gain calculation circuit configured to extract only color component of infrared light and multiply it by a gain of a predetermined multiplication factor a first color adjustment circuit configured to perform output by allocating the color component of the infrared light into green component and blue component a second gain calculation circuit configured to set gains of the green component and blue component to equivalent multiplication and multiply the color component of the infrared light by a gain of a multiplication factor smaller than the predetermined multiplication factor a second color adjustment circuit configured to convert the color component of the infrared light into the green component and convert the green component into a red component and a switching unit configured to perform a switching process of inputting a captured image to one of the first and the second gain calculation circuits.
