A Fisheye Image Correction Method for Equipment with Angled Side Mounting

A fisheye image and correction method technology, applied in the field of image correction, can solve the problems of large amount of calculation, large effective area for cropping, unsatisfactory correction effect, etc., and achieve the effect of maximizing the monitoring area

CN108230241BActive Publication Date: 2021-03-16JINAN JOVISION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-03-16

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Abstract

The invention discloses a method for correcting a fisheye image with an angled side-mounted device, which includes the following steps: extracting the effective range of the fisheye; performing rough correction of barrel distortion on the image; performing angle correction on the image; and performing effective correction on the corrected image. Range cutting; perform cubic Bezier curve back-projection transformation on the image; perform effective range cutting on the resulting image. The present invention can not only maximize the effective area ratio of the original fisheye image obtained, but can also correct the fisheye image obtained when the side belt is mounted at a certain angle, and have a good correction result for the fisheye image. In addition, , the correction method mentioned in the present invention can be used to crop the image content to a minimum, ensuring that the effective monitoring area is maximized.
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Description

technical field

[0001] The invention relates to an image correction method, in particular to a fisheye image correction method with an angled side-mounted device. Background technique

[0002] A fisheye lens is a lens with a focal length of 16mm or less and a viewing angle close to or equal to 180°. It is an extreme wide-angle lens. The fisheye lens is a special kind of lens in the super wide-angle lens, and its vision angle strives to reach or exceed the range that the human eye can see. The super wide-angle feature of the fisheye lens image makes the image captured by the lens give people a very strong perspective effect, but this shocking appeal has to be paid for by very strong image distortion. The result of this distortion is that only the scene in the center of the lens has almost no distortion, and there are serious scene distortions in other places. The rule of this distortion is that the farther away from the center of the lens, the more serious the scene distort...

Examples

Embodiment Construction

[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention. The protection scope of the present invention includes but is not limited to In the following examples, without departing from the spirit and scope of the present application, any modifications made to the details and forms of the technical solutions of the present invention fall within the protection scope of the present invention.

[0057] Accompanying drawing is a kind of specific embodiment of the present invention. A fisheye image correction method with an angled side installation of this embodiment includes the following steps:

[0058] S1. Fisheye effective range extraction:

[0059] Collect drum-shaped fisheye images, because the collected drum-shaped fisheye image...