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118 results about "Independent parameter" patented technology

Online network temperature-measuring thermal imager calibration method

The invention relates to an online network temperature-measuring thermal imager calibration method, in particular to a calibration method for temperature measurement of a thermal imager in engineering application. The online network temperature-measuring thermal imager calibration method is characterized by comprising the following steps: fusing major factors influencing the temperature measuring accuracy of a temperature-measuring thermal imager into a calibration process flow; decomposing the influence factors into independent parameters which can be determined respectively through an engineering measuring method in a laboratory; establishing a calibrated mathematical model according to a temperature measuring theory; determining a specific calibration implementation method by using the mathematical model. According to the online network temperature-measuring thermal imager calibration method, the major factors influencing the temperature measuring accuracy of the temperature-measuring thermal imager are fused into the calibration process flow, the influence factors are decomposed into independent parameters which can be determined respectively through the engineering measuring method in the laboratory, the calibrated mathematical model is established according to the temperature measuring theory, and considered compensation factors are close to a practical application environment during calibration, so that the accuracy of a temperature measuring result is high.
Owner:KUNMING NORTH INFRARED TECH CO LTD

Method for establishing equivalent geometric imaging model of high-resolution satellite image by using RPC parameters

The invention relates to a method for establishing an equivalent geometric imaging model of a high-resolution satellite image by using RPC parameters. The method comprises: selecting a random scanningline of a high-resolution satellite image and listing a collinear condition equation of a projection center, an image point and a corresponding object square point; on the basis of operating characteristics and geometric characteristics of the high-resolution satellite, abstracting three rotation angles and six orbital numbers in an equivalent principal distance, a principal point coordinate, andan offset matrix and forming 11 independent parameters of an equivalent geometric imaging model; and with RPC parameters, calculating parameters of the equivalent geometric imaging model directly. Therefore, inherent problems of the over-parameterization of the RPC, strong correlation between parameters, and residual error existence of the fitting tight imaging model are solved; the parameters have the obvious geometric and physical meanings; and modeling analysis can be carried out on various imaging error sources conveniently. The mutual conversion of RPC parameters is realized; and the positioning accuracy of high-resolution satellite image is improved.
Owner:WUHAN UNIV
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