Method for obtaining fish-eye image correction relationship and fish-eye correction

An image correction and image technology, applied in the parts of TV systems, image communication, color TV parts, etc., can solve problems such as unnatural visual perception and inability to use correction processing.

Inactive Publication Date: 2007-11-14
林进灯
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Problems solved by technology

[0005] The traditional fisheye correction technology must have a heavy and complicated calculation process, and the video stream (VideoStream) has a considerable

Method used

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  • Method for obtaining fish-eye image correction relationship and fish-eye correction
  • Method for obtaining fish-eye image correction relationship and fish-eye correction
  • Method for obtaining fish-eye image correction relationship and fish-eye correction

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the present invention is described in further detail:

[0022] The present invention provides a method for obtaining fish-eye image correction relationship and fish-eye correction. It first uses complex correction points and polynomial approximation equations to obtain the best image distortion parameters, and then uses the image distortion parameters and the aforementioned polynomial approximation equations Calculate the corresponding relationship between the original image and the output image, and obtain the fisheye image correction correspondence table with implicit interpolation and resizing functions.

[0023] Figure 1a shows the distortion parameters of the fisheye image obtained by the present invention. As described in step S100, a fisheye lens is used to take a picture of the distorted image for correction, and this picture is called a correction figure; in steps S102 to S...

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Abstract

The method includes steps: the picture taken by fish-eye lens is as original image; multiple coordinates of correction points (CCP) are obtained from the original image; estimating actual coordinates of actual plane from CCP; using CCP and actual coordinates calculate a set of parameter of image distortion; using CCP calculates out rearranged coordinates and outputting image of corrected image in order to build image correction relation table of coincidence relation between original image and coordinates of each position in the output image. Using implied functions of interpolation and resetting magnitude, the table corrects fish-eye distorted image better and rapidly in real time. When applying image correction relation table on hardware platform, the method uses interpolation function in table, and operational method in the invention to reduce calculation amount of digital signal processor greatly, obtain optimal corrected output result.

Description

technical field [0001] The invention relates to a method for fisheye correction, in particular to a method for obtaining fisheye image distortion parameters and an image correction relation table, and realizing fisheye correction technology. . Background technique [0002] Whether it is a traditional camera or a digital camera, it is necessary to cooperate with the lens to present the image on the photosensitive material (such as: silver salt film) or photosensitive component (such as: CCD or CMOS), and the camera can change a variety of lenses according to different occasions, such as wide-angle lens, Fisheye lens and telephoto lens, etc. The fisheye lens is a special ultra-wide-angle lens. In order to achieve the maximum photographic angle of view, the front lens of this photographic lens has a short diameter and protrudes toward the front of the lens in a parabolic shape, which is similar to the eyes of a fish. Hence the name fisheye lens. [0003] The fisheye lens has...

Claims

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Application Information

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IPC IPC(8): H04N1/387H04N5/14
Inventor 林进灯范刚维杨建霆蒲鹤章钟仁峰
Owner 林进灯
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