Patent ID: 8724922

Claim:
An image correcting device for creating a corrected image through geometrical correction of an input image, comprising: an image input section configured to input the input image; an image storage section comprising a memory and configured to store the input image; a geometrical correcting section comprising a circuit and configured to geometrically correct the input image stored in the image storage section by calculating longitudes λ and latitudes Φ that correspond to respective pixel positions on an output image as the corrected image based on cylindrical projection for map projection; by calculating corrected latitudes φ, based on a function f(λ) and the latitudes Φ; by calculating light directions in a subject space, based on the longitudes λ and the corrected latitudes φ; by calculating positions on the input image as resampling positions, based on the light directions; and by associating the resampling positions with the pixel positions on the output image; and an image output section configured to output the input image corrected by the geometrical correction section, as the corrected image, wherein the corrected latitudes φ are calculated according to φ=tan −1 {tan(Φ)· f (λ)}, and wherein in a region where an absolute value of the longitude λ is larger than or equal to zero and smaller than or equal to π/2, the region being within a domain of the longitudes λ used for correction, the function f(λ) satisfies cos (λ)≦f(λ)≦1.