US 11,798,445 B2
Image processing apparatus having light-shielding plate, projection-type display apparatus, image processing method, and storage medium to correct luminance or color of image signal
Ikuo Takanashi, Tochigi (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 4, 2022, as Appl. No. 17/713,070.
Claims priority of application No. 2021-065726 (JP), filed on Apr. 8, 2021.
Prior Publication US 2022/0327972 A1, Oct. 13, 2022
Int. Cl. G09G 3/00 (2006.01)
CPC G09G 3/002 (2013.01) [G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2354/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An image processing apparatus for use with a projection system that includes a first projection-type display apparatus configured to project a first projection image so that the first projection image and a second projection image partially overlap each other on a projected surface, a second projection-type display apparatus configured to project the second projection image, and a light-shielding plate disposed between the projected surface and the first projection-type display apparatus, and configured to reduce a projected light amount on an overlapped area of the first projection image and the second projection image of the projected surface, the image processing apparatus comprising:
at least one processor and
at least a memory containing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising:
a correction task configured to correct an image signal that has been input to the first projection-type display apparatus,
wherein the first projection image includes:
a first area which part of the second projection image overlaps and where a luminance decreases compared to the case where the light-shielding plate is not disposed due to an influence of the light-shielding plate,
a second area that is adjacent to the first area and where a luminance increases compared to the case where the light-shielding plate is not disposed due to the influence of the light-shielding plate, and
a third area different from the first area and the second area, and
wherein when the light-shielding plate is disposed between the projected surface and the first projection-type display apparatus, the correction task corrects one of a luminance and a color of the image signal corresponding to the second area by lowering a level of the image signal corresponding to the second area in accordance with the luminance of the second area so as to reduce a difference from a corresponding one of a luminance and a color of the image signal corresponding to at least one of the first area and the third area.