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Wide-angle lens TV distortion test method and device

A wide-angle lens and testing method technology, which is applied to measurement devices, optical instrument testing, and optical performance testing, etc., can solve the problems of inability to directly obtain TV distortion values, calculation of wide-angle lens distortion values, etc., and achieve the effect of solving the problem of testing efficiency.

Active Publication Date: 2020-05-12
HANGZHOU TUYA INFORMATION TECH CO LTD
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  • Application Information

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Problems solved by technology

[0003] However, this method needs to be calculated with the help of software, and the TV distortion value cannot be directly obtained; and the distortion value of the wide-angle lens cannot be calculated to the outermost field of view of the image through imastest, and only the TV distortion value within the 0.7 field of view can be calculated

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  • Wide-angle lens TV distortion test method and device
  • Wide-angle lens TV distortion test method and device
  • Wide-angle lens TV distortion test method and device

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Embodiment Construction

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0034] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for...

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Abstract

The invention discloses a wide-angle lens TV distortion test method comprising the steps: shooting a distortion target plate through a to-be-tested lens to obtain a distortion target plate image, wherein upper and lower horizontal lines of scale lines of the distortion target plate are tangent to the upper and lower edges of the distortion target plate image; displaying the distorted target imagethrough a display; pasting the distortion target plate on a display and scaling the distortion target plate image in an equal ratio to enable the distortion target plate image to be located in the distorted target plate; obtaining a distortion value which is corresponding to a grid line tangent to an upper frame and a lower frame of the distortion target plate and located on the distortion targetplate; and averaging TV distortion values of the plurality of angles to obtain TV distortion of the image. Compared with the prior art, the problem of testing efficiency can be solved, TV distortion values of shot distortion images can be directly read out, and software calculation is not needed. And the distortion value of any field of view can be tested. Specific distortion values of four corners of the image can be tested so as to determine whether four-corner distortion is uniform.

Description

technical field [0001] The present application relates to the field of optical testing, in particular, to a TV distortion testing method for a wide-angle lens. Background technique [0002] The existing wide-angle lens test method for TV distortion is to obtain an image by shooting a TV distortion target plate (grid format target plate), and import the image into imatest software for calculation of TV distortion. [0003] However, this method needs to be calculated with the help of software, and the TV distortion value cannot be directly obtained; and the distortion value of the wide-angle lens cannot be calculated to the edge of the field of view of the image through imastest, and only the TV distortion value within the 0.7 field of view can be calculated. Contents of the invention [0004] The main purpose of this application is to provide a wide-angle lens TV distortion test method, including: [0005] The distortion target is photographed by the lens to be tested to o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/0257
Inventor 李枭宁貟丽芳
Owner HANGZHOU TUYA INFORMATION TECH CO LTD
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