1. An image processing apparatus comprising: a determination unit configured to determine whether image quality of a tomographic image corresponding to a predetermined position in an imaging target captured by an optical coherence tomography apparatus is within a predetermined range; a control unit configured to control the optical coherence tomography apparatus whether to permit the image capturing for the predetermined position in response to a determination by the determination unit; and a generation unit configured to generate a new tomographic image by combining the tomographic images for the predetermined position including the tomographic images obtained according to the control.