Camera, distortion correction device and distortion correction method

摘要

An electronic zoom and distortion correction processing unit (104) performs electronic zooming and distortion correction of a distorted image by re-mapping the pixels of the distorted image. In accordance with a specified electronic zoom factor (S1), a re-mapping control unit (110) controls re-mapping by the electronic zoom and distortion correction processing unit (104) such that the correction factor (S4) of the distortion correction processing is changed in addition to the electronic zoom factor of the electronic zoom processing. By this means, the correction factor (S4) is changed in accordance with the specified electronic zoom factor (S1), and distorted images can be appropriately corrected while preventing denaturing of the images.

主权项

1. A camera comprising:
a lens that forms an image of a subject; an imaging sensor that acquires a captured image signal by converting an optical image formed by the lens into an electrical signal; an electronic zoom and distortion correction processor that performs an electronic zooming process on the captured image signal in accordance with a user-designated electronic zoom magnification ratio and a distortion correction process on the captured image signal in accordance with an adjustable correction factor; and a zoom-angle-of-view calculator that calculates an electronic zoom angle of view based on the user-designated electronic zoom magnification ratio and an angle of view of the lens, wherein the correction factor is adjusted in accordance with the user-designated electronic zoom magnification ratio, and wherein the electronic zoom and distortion correction processor changes the correction factor of the distortion correction process in accordance with the electronic zoom angle of view calculated by the zoom-angle-of-view calculator, wherein a value of the correction factor of distortion correction of a straight vertical line is greater than a value of the correction factor of distortion correction of a straight horizontal line which is changed in accordance with the user-designated electronic zoom magnification ratio.