Patent ID: 11862055
Assignee: SEIKO EPSON CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G  H

Claim 0:
1. A position detection method comprising:
projecting a first pattern image on a display surface, the first pattern image including a first region having a first color which corresponds to a first portion of a first identification information indicating the first region and a second region having a second color corresponding to a first portion of a second identification information indicating the second region, an order of the first identification information and the second identification information is predetermined;
obtaining a first captured image by capturing the display surface on which the first pattern image is projected;
projecting a second pattern image onto the display surface, the second pattern image including the first region having a third color which corresponds to a second portion of the first identification information which is different from the first portion and the second region having a fourth color corresponding to a second portion of the second identification information which is different from the first portion;
obtaining a second captured image by capturing the display surface on which the second pattern image is projected;
associating a first position in an image projected on the display surface with a second position in a third captured image that obtained by capturing the display surface on which the image is projected, based on the first color and the second color which are detected in the first captured image, and the third color and the fourth color which are detected in the second captured image.