Patent ID: 8493401

Claim:
An image processing apparatus for correcting image signals corresponding to a plurality of color images constituting an image, comprising: a correction table storage unit storing one or more correction tables; and an image signal correcting unit separately and independently correcting each of the plurality of color images of the image signals on the basis of one of the one or more correction tables stored in the correction table storage unit, wherein the separately and independently correcting comprises geometric correction for each of the plurality of color images of a display image corresponding to the image such that display color images each corresponding to the color images superpose each other, and simultaneous correction of a pixel shift caused by installation precision, an influence of temperature, or chromatic aberration of optical components, and wherein when the image is displayed on a cylindrical screen with a radius R by an displaying apparatus disposed backwardly apart by L from a point of view located at a center of the cylindrical screen, the one of the one or more correction tables stored in the correction table storage unit includes correction data of an angle θ by the use of the following expression, Δ ⁢ ⁢ x = R ⁡ ( L + R 2 - w 2 ) ⁢ sin ⁢ ⁢ θ R ⁢ ⁢ cos ⁢ ⁢ θ + L - R 2 - w 2 ⁢ tan ⁢ ⁢ θ where 2w represents a width in a horizontal direction of the cylindrical screen as viewed from the point of view and Δx represents correction data for a sub pixel in a direction of the angle θ from the point of view.