Patent ID: 11950028
Assignee: SEIKO EPSON CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A projector comprising:
a projection optical system including a projection lens; and
a processing device programmed to execute
projecting a correction image having a rectangular shape on a projection surface from using the projection optical system, the rectangular shape having four vertexes at different distances from the projection lens of the projector when projected on the projection surface, the correction image including
a first side which is one of two sides of the correction image forming a vertex located farthest from the projection lens out of the four vertexes of the correction image, and
correction points arranged on the first side, a number of the correction points arranged on the first side being larger than a number of correction points arranged on a second side that is different from the two sides and that does not form the vertex located farthest from the projection lens,

receiving an operation of moving a first correction point included in the correction points arranged on the first side, and
projecting, using the projection optical system, an output image obtained by applying a distortion correction based on the operation to an input image.