US 9,811,876 B2
Display apparatus and control method
Makiko Mori, Yokohama (JP); and Kensuke Inagaki, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 24, 2016, as Appl. No. 15/245,384.
Claims priority of application No. 2015-170655 (JP), filed on Aug. 31, 2015.
Prior Publication US 2017/0061575 A1, Mar. 2, 2017
Int. Cl. G06T 3/00 (2006.01); G03B 21/14 (2006.01)
CPC G06T 3/005 (2013.01) [G03B 21/147 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display apparatus including a projection optical system that projects an image on a projection surface, the display apparatus comprising:
a deforming unit configured to geometrically deform an input image in order to correct a distortion in a projected image obtained when the input image is projected on the projection surface; and
a setting unit configured to set parameters of image deformation processing by the deforming unit, wherein
the setting unit sets the parameters such that a position of an intersection of diagonal lines of a first projected image obtained when the image before being deformed according to the set parameters is projected on the projection surface is identical to a position of an intersection of diagonal lines of a second projected image obtained when a deformed image, which is an image after being deformed according to the set parameters, is projected on the projection surface.