1. A camera unit with driving corridor display functionality for a vehicle, comprising: an image sensor configured to obtain an image outside the vehicle; an interface controller configured to generate a plurality of nodes of a driving corridor image for a required steering angle, the plurality of nodes being calculated as points on Bezier curve; and an image processing device configured to generate driving corridor markers and to superimpose the driving corridor markers on the image transmitted from the image sensor, the driving corridor markers being calculated in the image processing device on the basis of coordinates of the nodes transmitted from the interface controller and being generated by connecting the nodes adjacent to each other with line segments.