Angled side-mounted fisheye image correction method of equipment

Abstract

The invention discloses an angled side-mounted fisheye image correction method of equipment. The method comprises the following steps: extracting a fisheye effective range; carrying out barrel distortion rough correction on images; carrying out angle correction on the images; cutting the corrected images in an effective range; performing Bezier curves back projection transform on the images for three times; cutting a result image in the effective range. According to the angled side-mounted fisheye image correction method of the equipment disclosed by the invention, an effective area ratio of the acquired original fisheye images is maximized; moreover, the acquired fisheye images during side mounting at a certain angle are rectified at a certain angle, and a good correction effect on the fisheye images is achieved. In addition, by utilizing the method disclosed by the invention, cutting of image contents to a minimum extent can be corrected, and the maximization of the effective monitoring area can be ensured.

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...

AI Technical Summary

Problems solved by technology

[0003] The correction method involved in the existing technology has problems such as the farther the image pixel is from the center point, the less ideal the correction effect is, and the effective area of ​​the clipping after correction is too large, and most of them are algorithm designs for full-circle fisheye images.

Chinese Patent Publication No. CN104778656 discloses a fisheye image correction method for spherical perspective projection. It is necessary to calculate the mapping from the acquired fisheye image to the spherical surface. This mapping process is not only computationally intensive, but also mainly aimed at full circle fisheye images.

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