An image processing apparatus includes an image acquisition unit that uses a camera installed in an own vehicle to acquire images of an environment outside the own vehicle at predetermined intervals, an object candidate recognition unit that recognizes an object candidate in the image, an object determination unit that determines that the object candidate is an object on condition that the same object candidate is recognized in N consecutive frame images (N is a natural number), a parameter X acquisition unit that acquires a parameter X correlated with an apparent moving speed of a stationary object in the images, and an N setting unit that sets N smaller as the moving speed correlated with a value of the parameter X increases.