Method and device for detecting image definition

A technology for image definition and image detection, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as large scene differences, narrow application range, and certain specific images have certain effects, and achieve accurate estimation results , the effect of fast operation speed

Active Publication Date: 2013-05-08
ZHEJIANG DAHUA TECH CO LTD
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AI Technical Summary

Problems solved by technology

At present, there are some sharpness measurement methods. Most of the algorithms extract some feature quantities from the image that can reflect the image sharpness to a certain extent, and use these feature quantities as the image sharpness measurement value. These feature quantities have cert

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  • Method and device for detecting image definition
  • Method and device for detecting image definition
  • Method and device for detecting image definition

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0038] Such as figure 1 As shown, it is a flow chart of a method for detecting image clarity according to an embodiment of the present invention, and the method for detecting image clarity includes:

[0039] 101. Obtain the input original image, the original image can be recorded as f o ;

[0040] 102. Convert the original image into a grayscale image, and the grayscale image can be recorded as f gray ;

[0041] 103. Denoising the grayscale image to obtain...

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Abstract

The invention provides a method for detecting image definition and a device for detecting the image definition. The method for detecting the image definition includes the steps: obtaining an input primary image; enabling the primary image to be converted into a gray level image; conducting denoising to the gray level image to obtain a denoising image; obtaining a peripheral point of the denoising image; conducting lowpass filtering operation to the denoising image to obtain a blurred image; respectively calculating image definition characteristic quantity of each peripheral point of the denoising image and image definition characteristic quantity of each peripheral point of the blurred image; calculating the image definition characteristic quantity of the each peripheral point according to the image definition characteristic quantity of the denoising image and the image definition characteristic quantity of the blurred image; and calculating and enabling an average value of the image definition characteristic quantity of all peripheral points to be used as image definition characteristic quantity of the primary quantity so as to judge the image definition characteristic quantity of the primary quantity. The method for detecting the image definition and the device for detecting the image definition can determine image definition precisely, and a suggested image definition estimation scheme can be suitable for the vast majority of images.

Description

technical field [0001] The invention relates to the technical field of image quality evaluation, in particular to a method and device for detecting image clarity. Background technique [0002] Image quality is an important indicator for judging the performance of image acquisition equipment and whether its working status is normal, and it is also widely used in image processing algorithm performance comparison and system parameter optimization. Therefore, it is of great significance to establish an effective image quality evaluation mechanism in the fields of image acquisition, encoding and compression, and network transmission. [0003] In recent years, with the development of image processing technology, research in this field has attracted extensive attention of researchers. Image quality evaluation algorithms emerge in endlessly, and image quality evaluation can be divided into two categories: subjective evaluation methods and objective evaluation methods. [0004] The...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T7/00
Inventor 潘石柱张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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