MTF-based remote sensing image quality evaluation method

Abstract

The invention belongs to the technical field of remote sensing, and particularly relates to an MTF-based remote sensing image quality evaluation method. The method comprises the following steps: step1, selecting a calculation area; step 2, carrying out straight line fitting on the step edge of the image; 3, fitting an edge spread function; 4, performing deriving to obtain a line spread function;and step 5, performing Fourier transform to obtain an MTF. The method solves the problem of objective evaluation of the remote sensing image. According to the method, the remote sensing image can be objectively evaluated, and the problems that a subjective evaluation method depends on testers to manually interpret the remote sensing image, time and labor are wasted, and automatic interpretation ofmassive remote sensing data is not facilitated are solved. In the actual application of remote sensing image processing, a reference image corresponding to a distorted image cannot be obtained, and areference evaluation method is not suitable, so that the reference-free evaluation method based on MTF has greater application advantages and wider application range.

Description

technical field [0001] The invention belongs to the technical field of remote sensing, and in particular relates to an MTF-based remote sensing image quality evaluation method. Background technique [0002] During the long-term operation of the earth observation remote sensor, due to the aging of its own components, changes in the space environment, transmission media and other factors, the image quality will be degraded to varying degrees during the process of data acquisition, transmission, processing, and storage, which greatly It affects subsequent processing and applications such as image registration, fusion, target recognition, and change monitoring. In order to evaluate the quality of remote sensing images with different distortion types, it is very important to study the comprehensive factors for the evaluation indicators of various degradation factors. Through the quality analysis and evaluation of remote sensing images, it can guide the imaging control of on-orbi...

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention proposes a method for evaluating the quality of remote sensing images based on MTF, which is used to solve the problem of manual interpretation using subjective evaluation methods in the prior art, which is time-consuming and laborious, which is not conducive to the automatic interpretation of massive remote sensing data and cannot obtain distorted images. The corresponding reference image cannot be applied to the practical application of remote sensing image processing. Medium technical problems

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