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Camera lens resolution detection method and device

A resolution and camera technology, applied in the field of camera lens resolution detection, can solve the problems of inability to obtain detection results and great influence

Active Publication Date: 2016-09-21
深圳虹识技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of the embodiment of the present invention is to provide a camera lens resolution detection method and device to solve the problem that whether the image captured in the existing camera lens resolution detection method has a great influence on the resolution detection result , sometimes even the detection result cannot be obtained, and when the resolution of the camera lens exceeds the test range of the test card, the detection result cannot be obtained

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  • Camera lens resolution detection method and device
  • Camera lens resolution detection method and device

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Embodiment 1

[0077] An embodiment of the present invention provides a camera lens resolution detection method. This method solves the problem that whether the resolution test card picture taken by the camera lens to be detected is level has a great influence on the resolution detection result, and when the resolution of the camera lens to be detected exceeds the test range of the resolution test card, it also test results can be obtained.

[0078] When using the method provided by the embodiment of the present invention to detect the resolution of the camera lens to be detected, the resolution test card needs to be photographed by the camera lens to be detected to obtain a picture of the resolution test card, which can be photographed multiple times to obtain multiple images of the resolution test card Choose one of the clearest resolution test card pictures from the multiple resolution test card pictures taken to be used for testing the resolution of the camera lens to be tested.

[0079...

Embodiment 2

[0134] An embodiment of the present invention provides a camera lens resolution detection device. Such as Figure 5 As shown, the device includes:

[0135] Intercepting module 510, is used for, in the resolution test card picture that is taken by camera lens to be detected, intercepts the first wedge-shaped figure of test area;

[0136] The rotation module 520 is used to rotate the first wedge until the first wedge is perpendicular to the preset edge of the resolution test card picture to obtain the second wedge;

[0137] An acquisition module 530, configured to acquire a spectrogram corresponding to the gray value matrix of the second wedge diagram;

[0138] The determination module 540 is configured to determine the resolution two-dimensional index of the camera lens to be detected according to the above spectrum diagram, and the resolution two-dimensional index includes the resolution value of the camera lens to be detected and the resolution limit line sub-wave peak valu...

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Abstract

The present invention provides a camera lens resolution detection method and device. The method comprises the steps of intercepting a first wedge pattern of a test area from a resolution test card picture shot by a to-be-detected camera lens; rotating the above first wedge pattern until the first wedge pattern is perpendicular with the preset edges of the resolution test card picture to obtain a second wedge pattern; obtaining a frequency spectrogram corresponding to a grey value matrix of the second wedge pattern; according to the above frequency spectrogram, determining a resolution two-dimensional index of the to-be-detected camera lens, wherein the resolution two-dimensional index comprises a resolution value of the to-be-detected camera lens and a resolution limit line number crest value. According to the present invention, the problem that whether the resolution test card picture shot by the to-be-detected camera lens is horizontal influences a resolution detection result greatly, is solved, and when the resolution of the to-be-detected camera lens exceeds the test range of a resolution test card, the detection result also can be obtained.

Description

technical field [0001] The invention relates to the technical field of optical lenses and image processing, in particular to a camera lens resolution detection method and device. Background technique [0002] The camera lens is the most critical equipment of the camera, and the resolution of the camera lens directly affects the overall index of the camera. Therefore, when evaluating the overall quality of the camera, it is necessary to check the resolution of the camera lens. [0003] In related technologies, the resolution of the camera lens is mostly detected by the HYRES software. First, the camera lens to be tested is used to shoot the image of the ISO12233 (International Standardization Organization12233, International Standardization Organization) resolution test card, and then the captured image is captured by the HYRES software. Identify the number of lines in the area to be tested in the image, and the resolution corresponding to the limit position of the identified...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 托马斯·费尔兰德斯李双双钦培
Owner 深圳虹识技术有限公司