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Lens definition measurement method, device and system and measurement graphic card

A measurement method and technology of measurement charts, which are applied in image communication, television, electrical components, etc., can solve problems such as low accuracy and large errors, and achieve the effect of solving large errors and improving convenience and accuracy

Inactive Publication Date: 2020-05-08
BEIJING SMARTER EYE TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] For this reason, the embodiments of the present invention provide a lens sharpness measurement method, device, system, and measurement chart to at least partially solve the technical problems of large errors and low accuracy of the traditional sharpness measurement method

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  • Lens definition measurement method, device and system and measurement graphic card
  • Lens definition measurement method, device and system and measurement graphic card
  • Lens definition measurement method, device and system and measurement graphic card

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Embodiment Construction

[0061] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] In a specific embodiment, such as figure 1 As shown, the present invention provides a kind of measurement chart card 1, and this measurement chart card is the form of circular stripe target, and this measurement chart card comprises at least one sampling component 11, and described sampling component 11 comprises several black and white circular stripes, Each of the circular stripes forms...

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Abstract

The invention discloses a lens definition measurement method, device and system and a measurement graphic card, and the method comprises the steps: respectively obtaining sampling points on all circular stripes in a plurality of sampling directions, and obtaining stripe groups in all sampling directions, wherein each stripe group comprises n black and white stripes, and n is the number of the circular stripes; obtaining a gray scale maximum value and a gray scale minimum value in each stripe group based on a high-contrast sine curve; obtaining an average value of the gray scale maximum valuesaccording to the gray scale maximum values of the stripe groups, obtaining an average value of the gray scale minimum values according to the gray scale minimum values of the stripe groups; obtainingan MTF measurement value according to the gray scale maximum value average value and the gray scale minimum value average value. The technical problems that a traditional definition measuring method is large in error and low in accuracy are at least partially solved.

Description

technical field [0001] The invention relates to the technical field of binocular camera imaging, in particular to a lens sharpness measurement method, device, system and measurement chart. Background technique [0002] For imaging systems, resolving power and definition are an important measurement index. When evaluating camera performance, evaluating the resolving power and definition of a camera is an essential step. The current sharpness measurement methods of camera lenses include TV-Line detection, MTF detection, and SFR detection. Among them, TV-Line mainly uses test cards (such as ISO12233 test card) for subjective evaluation, lack of unified evaluation standards, different people reading and different status will lead to unstable readings, poor detection reliability and stability. MTF is the abbreviation of Modulation Transfer Function, the Chinese is the modulation function, which refers to the function of the modulation degree changing with the spatial frequency. ...

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Application Information

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IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 郝源崔峰王欣亮李建
Owner BEIJING SMARTER EYE TECH CO LTD
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