US 2015/0146048 A1 · RADIAL DISTORTION PARAMETER ACQUIRING METHOD AND APPARATUS

Abstract

Embodiments of the present invention disclose a radial distortion parameter acquiring method and apparatus. The method includes: randomly selecting a plane as a first plane; making an optical axis of a digital image capture device perpendicular to the first plane, and photographing the first plane to obtain a distorted image of the first plane; acquiring n arcs from the distorted image; and obtaining, by calculation, a radial distortion parameter of the digital image capture device according to the arcs. The apparatus includes: a selecting unit, a photographing unit, an acquiring unit, and a calculating unit. By applying the embodiments of the present invention, only one distorted image needs to be photographed to acquire a radial distortion parameter of a digital image capture device, and the distorted image can be acquired depending on a natural environment.

Claims12

Dependent claims

A radial distortion parameter acquiring method, comprising:

randomly selecting a plane as a first plane;
making an optical axis of a digital image capture device perpendicular to the first plane, and photographing the first plane to obtain a distorted image of the first plane, wherein the distorted image comprises images of m straight lines, the m straight lines are located on the first plane, the m straight lines are parallel to each other, and m≧2;
acquiring n arcs from the distorted image, wherein each arc represents an image of a straight line in the m straight lines, and 2≦n≦m;
and
obtaining, by calculation, a radial distortion parameter of the digital image capture device according to the arcs.

2 more elements

A radial distortion parameter acquiring apparatus, comprising:

a selecting unit, configured to randomly select a plane as a first plane;
a photographing unit, configured to make an optical axis of a digital image capture device perpendicular to the first plane that is selected by the selecting unit, and photograph the first plane to obtain a distorted image of the first plane, wherein the distorted image comprises images of m straight lines, the m straight lines are located on the first plane, the m straight lines are parallel to each other, and m≧2;
an acquiring unit, configured to acquire n arcs from the distorted image that is obtained by photographing by the photographing unit, wherein each arc represents an image of a straight line in the m straight lines, and 2≦n≦m;
and
a calculating unit, configured to obtain, by calculation, a radial distortion parameter of the digital image capture device according to the arcs that are acquired by the acquiring unit.

2 more elements

Dependencies are inferred from the claim text.

Radial distortion parameter acquiring method and apparatus

Life of this patent

Radial distortion parameter acquiring method and apparatus

Life of this patent

Abstract

Claims12