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Fisheye image edge enhancement method

A fisheye image and edge enhancement technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as inability to directly process, image deblurring, etc.

Inactive Publication Date: 2017-06-27
CHANGSHA PANODUX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the existing image enhancement methods, the distorted fisheye image is directly processed, but because the fisheye image data is stored in a nonlinear manner, it cannot be directly processed, and this processing method cannot obtain a better image deblurring effect

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Due to the special structure of the fisheye lens, the captured fisheye image has a large deformation, which is quite different from the visual effect of the human eye, and the image data is stored in a non-linear manner, which cannot be directly processed. The image is rectified to a linear projection image.

[0030] In order to solve the problem that the existing fisheye image deblurring can not obtain better effect, the present invention provides a fisheye...

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Abstract

The invention discloses a fisheye image edge enhancement method, and belongs to the field of digital image processing technology. The method comprises the steps of projecting pixel points of a fisheye image into a cylindrical panoramic image, and determining the adjacent pixel points in horizontal and vertical directions in the cylindrical panoramic image according to a gradient calculation method; then projecting into the fisheye image to find corresponding locations of the corresponding pixel points; calculating, according to horizontal and vertical adjacent pixel points of any pixel point found in the fisheye image, the gradient value of the pixel point; calculating the total variation of the fisheye image according to the gradient value of any pixel point in the fisheye image; and obtaining the fisheye clear image l* based on the image restoration problem of the fisheye total variation minimization that is to solve the minimization problem of the following equation, l*=argmin [||k*l-B||2+<lambda>Jfish-TV(I)]. Through the method, a clear image is obtained by solving the image restoration problem of the fisheye total variation minimization, so as to obtain a clear fisheye image with better deblurring effect.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a fisheye image edge enhancement method. Background technique [0002] The shape of the fisheye lens is different from other lenses. The front group of lenses protrudes outward like a fisheye. It is a special wide-angle lens. Objects in airspace are imaged within a limited range of phases. [0003] From the perspective of optical design, the lens used in the fisheye lens has a large spherical curvature and is closer to the imaging plane. This special structural feature and imaging feature, on the one hand, enables the fisheye camera to obtain a large field of view, and can be widely used in real-life scenes that require a large field of view, such as robot navigation, video conferencing, real-time monitoring, panoramic photography, and astronomical observation. application; on the other hand, due to the introduction of a large barrel distortion, the image forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/94
Inventor 不公告发明人
Owner CHANGSHA PANODUX TECH CO LTD