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Method and system for predicting image quality grade

A technology of image quality and prediction method, which is applied in image communication, television, electrical components, etc., can solve the problems of the same NIIRS level, rough criterion content, and reduce the accuracy of the judgment result of the image quality level to be evaluated, so as to improve the accuracy and consistency, and solve the effect of low accuracy of evaluation results

Active Publication Date: 2017-02-22
SPACE STAR TECH CO LTD
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Problems solved by technology

Due to the differences in the experience levels of the image analysts themselves, the subjective judgment directly based on the content of the NIIRS criterion cannot effectively guarantee the accuracy and consistency of the judgment results
Moreover, the currently used NIIRS criterion content only has integer grades, and its criterion content is relatively rough, which can easily cause the final NIIRS grades of two images with obviously different quality to be the same, thus further reducing the quality level of the image to be evaluated. Accuracy of results

Method used

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  • Method and system for predicting image quality grade
  • Method and system for predicting image quality grade
  • Method and system for predicting image quality grade

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Embodiment Construction

[0062] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. The following description includes various specific details to aid in understanding, but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0063] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art tha...

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Abstract

The invention discloses a method and a system for predicting an image quality level, the method includes the following steps: selecting multiple specific images, calculating a first IQM value of each selected specific image, determining a specific NIIRS value of each specific image based on the first IQM value; fitting in conducted according to an image quality grade forecast formula based on the calculated the first IQM value and the specific NIIRS value, and determining the coefficient a and the coefficient b in the image quality grade forecast formula, wherein the image quality grade forecast formula is NIIRS=a-Log10 * IQM+b; calculating a second IQM value of the to-be-evaluated image; substituting the second IQM value into the determined image quality grade forecast formula, and calculating a NIIRS value of the to-be-evaluated image. By combination of the IQM and the NIIRS and optimization of a traditional NIIRS criterion content based on the IQM, the accuracy and consistency of image quality grade evaluation results are improved.

Description

technical field [0001] The invention relates to the technical field of remote sensing image quality evaluation, in particular to an image quality grade prediction method and system. Background technique [0002] Image quality evaluation is a complex process. Traditional image quality evaluation is usually based on parameters such as image scale, resolution, signal-to-noise ratio, and MTF (Modulation Transfer Function). However, the above evaluation parameters have certain limitations, and cannot be adaptively adjusted according to user requirements for image quality. Based on this, foreign countries have carried out in-depth research on image quality evaluation, and established an application-based remote sensing image quality grading standard NIIRS (National Image Interpretation Rating Scale, the United States National Image Interpretation Rating Scale). [0003] However, the above-mentioned application-based remote sensing image quality classification standard is a quanti...

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Application Information

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IPC IPC(8): H04N17/00
CPCH04N17/004
Inventor 杨夏芳张轩
Owner SPACE STAR TECH CO LTD
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