從多波段圖像中獲取大氣透過率的測(cè)量方法
[Abstract]:A method for measuring the atmospheric transmittance of non-gas absorption band and weak gas absorption band based on single frame multi-band image is presented. It can be used to evaluate and correct the atmospheric attenuation effect in correlative photoelectric engineering. Firstly, the radiation image is obtained by using the image acquisition equipment which has been calibrated by absolute radiation, secondly, the wide band mean atmospheric transmittance corresponding to the dark channel of the radiation image is obtained based on the optical model of image degradation in the atmosphere and the theory of dark channel priori statistics. Finally, the atmospheric transmittance of specific band is obtained by combining the relationship between the extinction coefficient of specific band and the average extinction coefficient of wide band. The experimental results show that this method has a high correlation with the visibility meter and lidar measurement results, and the correlation coefficient is between 0.89 and 0.95, compared with the lidar, and the correlation coefficient is between 0.89 and 0.95, compared with the lidar, and the correlation coefficient is between 0.89 and 0.95. The correlation coefficients are between 0.95 and 0.97; The average relative deviation between 1km and visibility meter is up to 9% and 6%, respectively. In long range, compared with visibility meter, the average relative deviation of Lidar measurement results is 9% and 6%, respectively, and compared with that measured by visibility meter at long distance. The average relative deviations of 4km and 6km are 15% and 30%, respectively. Compared with lidar measurements, the average relative deviations of 4km and 6km are 9% and 18%, respectively.
【作者單位】: 中國科學(xué)技術(shù)大學(xué)環(huán)境科學(xué)與光電技術(shù)學(xué)院;中國科學(xué)院安徽光學(xué)精密機(jī)械研究所大氣成分與光學(xué)重點(diǎn)實(shí)驗(yàn)室;光電對(duì)抗測(cè)試評(píng)估技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(No.41505023) 光電對(duì)抗測(cè)試評(píng)估技術(shù)重點(diǎn)實(shí)驗(yàn)室開放課題(No.GKCP2016002)資助~~
【分類號(hào)】:P412;TP391.41
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