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Optical center detection method and detection device and correction method

A technology of optical center and detection method, which is applied in the field of photography, and can solve problems such as the inability to obtain the position of the optical center and the inaccurate acquisition of the position of the optical center

Inactive Publication Date: 2018-07-24
TRULY OPTO ELECTRONICS
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Problems solved by technology

[0005] In view of this, the present invention provides an optical center detection method, a detection device, and a correction method of a fisheye lens camera module to solve the problem that the optical center of a fisheye lens in the prior art cannot use the same gray scale halo to obtain the optical center position. Or the problem of inaccurate acquisition of the optical center position

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  • Optical center detection method and detection device and correction method
  • Optical center detection method and detection device and correction method

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[0039] As mentioned in the background art section, other lens optical center detection methods in the prior art are not suitable for the optical center detection of fisheye lenses, and once the optical center position of the fisheye lens shifts relative to the center of the optical sensor, it will cause the picture Lost.

[0040] The inventor found that as figure 1 As shown, it is a picture formed by other lenses and optical sensors in the prior art. Normally, the photosensitive chip 20 of the optical sensor has a larger area than the lens imaging circle 10, and the lens imaging circle 10 completely falls into the photosensitive chip 20. The light pattern and the light intensity of other parts of the photosensitive chip are used to obtain the lens imaging circle, and then the same gray level halo method can be used to obtain the center of the imaging circle. But like figure 2 As shown, it is the imaging circle of a fisheye lens. Due to the characteristics of the fisheye lens, th...

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Abstract

The invention provides a fisheye lens photographing module group optical center detection method and detection device and correction method. The fisheye lens photographing module group optical centerdetection method comprises the steps that the image formed on an optical sensor by the light through the fisheye lens is acquired, wherein the image includes an arc image; one segment of arc in the arc image is identified; and the center of circle of one segment of arc is calculated, and the center of circle acts as the optical center of the fisheye lens photographing module group. According to the optical detection method, calculation is performed by using the geometric principle based on the relation between the arc and the center of circle so that the method is more accurate in comparison with the conventional optical detection method that the highlight point on the image is calculated to act as the optical center by using the software.

Description

Technical field [0001] The present invention relates to the field of camera technology, in particular to a method for detecting an optical center of a fisheye lens camera module, a detecting device, and a correction method. Background technique [0002] A fisheye lens is a focal length of 16mm or shorter and an angle of view close to or equal to 180°. It is an extreme wide-angle lens, and "fisheye lens" is its common name. In order to maximize the photographic angle of view, the front lens of this photographic lens has a short diameter and a parabolic projection to the front of the lens, which is quite similar to the eyes of a fish, hence the name "fisheye lens". The fisheye lens is a special lens in the ultra-wide-angle lens, and its angle of view strives to reach or exceed the range that the human eye can see. [0003] Unlike ordinary field angle lenses, the imaging circle of the fisheye lens all falls within the photosensitive area of ​​the optical sensor. Therefore, the imagi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 王军
Owner TRULY OPTO ELECTRONICS