Method for obtaining measurement precision of optical remote sensing load on-orbit modulation transfer function (MTF) measured through dot matrix method
An optical remote sensing and payload technology, which is used in testing optical performance, image data processing, special data processing applications, etc. It can solve problems such as the inability to obtain MTF measurement accuracy, and achieve the effect of optimizing algorithms and point source/dot matrix target layout.
Active Publication Date: 2015-01-21
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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[0011] In order to solve the problem that the on-orbit MTF measurement of optical remote sensing payloads cannot be obtained or estimated by using the lattice method, the present invention proposes a method for obtaining the on-orbit MTF measurement accuracy of optical remote sensing payloads by the lattice method
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0027] The invention provides a method for obtaining the on-orbit MTF accuracy of an optical remote sensing payload. This method sets the MTF reference value based on the load parameters in the actual test. According to the characteristics of the lattice method MTF test, a reference image is generated by setting different lattice target parameters, and the MTF calculation value is obtained by calculating the reference image with the lattice method, and then The calculated value is compared with the MTF reference value to obtain the accuracy (or uncertainty) of the MTF measurement.
[0028] In an exemplary embodiment of the present invention, a method for obtaining the accuracy of on-orbit MTF of an optical remote sensing ...
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The invention provides a method for obtaining precision of an optical remote sensing load on-orbit modulation transfer function (MTF). According to the method, an MTF reference value is set on the basis of load parameters during practical testing, in allusion to characteristics of dot matrix method MTF testing, a reference image is generated by setting different dot matrix target parameters, the reference image is calculated by using a dot matrix method to obtain an MTF calculated value, then the calculated value is compared with the MTF reference value, and precision or uncertainty of MTF measurement is obtained. According to the method, quantified confidence measurement is provided for an MTF measurement result, and correctness of MTF measurement is guaranteed.
Description
technical field [0001] The invention relates to the technical field of earth observation remote sensing, in particular to a method for obtaining the on-orbit MTF measurement accuracy of an optical remote sensing load by a dot matrix method. Background technique [0002] Modulation Transfer Function (MTF) is an important indicator for evaluating the imaging performance of optical remote sensing payloads. It represents the percentage of modulation loss of each spatial frequency signal after passing through the optical imaging system, and reflects the signal loss of the imaging system during the imaging process of the target. The degree of diffusion and attenuation is one of the indicators commonly used in the world to evaluate the imaging performance and spatial resolution of optical remote sensing payloads. [0003] According to the different targets selected, the current methods for measuring the on-orbit MTF of optical remote sensing payloads mainly include the edge method,...
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Inventor 李传荣李晓辉唐伶俐胡坚李子扬朱家佳张静马灵玲朱博
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI