1. An image processing apparatus for performing an intersection test for rendering of a ray tracing scheme for a three dimensional (3D) image, comprising: a first calculator to perform a ray-plane test to determine whether a ray intersects a plane including a primitive and to perform a barycentric test to determine whether the ray intersects the primitive using at least one processor, wherein the first calculator comprises a plurality of unit calculation modules to perform the ray-plane test and to perform the barycentric test; and a second calculator to calculate a hit point, based on the ray which intersects the primitive, using at least one processor, wherein the number of unit calculation modules of the first calculator is greater than the number of processors of the second calculator, wherein the second calculator performs the hit point calculation, when the ray-plane test and the barycentric test are passed.