Patent ID: 8884979

Claim:
A projection display apparatus including an imager that modulates light emitted from a light source and a projection unit that projects light emitted from the imager on a projection surface, the projection display apparatus comprising: an imager controller that controls the imager to display a test pattern image in which a characteristic point is defined by at least three adjacent regions; an acquisition unit that acquires a captured image of the test pattern image from an imaging element configured to capture the test pattern image projected on the projection surface; and an adjustment unit that identifies the characteristic point included in the captured image on the basis of the captured image acquired by the acquisition unit, calculates adjustment parameters for an image to be projected on the projection surface based on the difference in position of the identified characteristic point from the test pattern characteristic point and adjusts the image based on the calculated adjustment parameters, wherein the at least three adjacent regions surround the characteristic point and are adjacent to the characteristic point.