Camera, distortion correction device and distortion correction method
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorAtsushi Morimura
Life of this patent
Estimating the term…
Abstract
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.
Claims19
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.
A distortion correction apparatus associated with a camera and a lens, comprising:
- an electronic zoom and distortion correction processor that performs an electronic zooming process on a distorted image in accordance with a user-designated electronic zoom magnification ratio and an angle of view of the lens, and a distortion correction process on the distorted image by remapping pixels of the distorted image in accordance with an adjustable correction factor;
- and
- a remapping controller that controls the remapping performed by the electronic zoom and distortion correction processor such that the correction factor is adjusted in accordance with the user-designated electronic zoom magnification ratio and the angle of view of the lens,
- 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.
A distortion correction method associated with a camera and a lens, comprising:
- performing an electronic zooming process and a distortion correction process on a distorted image by remapping pixels of the distorted image in accordance with a user-designated electronic zoom magnification ratio;
- calculating an electronic zoom angle of view based on the user-designated electronic zoom magnification ratio and an angle of view of the lens;
- and
- controlling the remapping by adjusting a correction factor in accordance with the user-designated electronic zoom magnification ratio,
- wherein the electronic zoom and distortion correction process changes the correction factor of the distortion correction process in accordance with the calculated electronic zoom angle of view,
- 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.
Dependencies are inferred from the claim text.