An image processing apparatus includes a projection control section configured to cause a projecting device, which projects an image on a projection surface, to project an image for correction including at least six correction points, a changing section configured to change, according to an instruction of a user, the position of at least one correction point among the at least six correction points projected on the projection surface by the projection control section, and a determining section configured to determine the position of the at least one correction point among the at least six correction points such that, when the image for correction is divided into a first image and a second image by a straight line connecting two correction points among the at least six correction points, the image for correction maintains a continuous shape in a joining portion of the first image and the second image.