本文選題：遙感 + 非均勻性校正�。� 參考：《光學(xué)學(xué)報(bào)》2017年05期

【摘要】：長(zhǎng)波紅外探測(cè)器經(jīng)常被用于機(jī)載紅外預(yù)警系統(tǒng)中,常受嚴(yán)重的非均勻性噪聲干擾。為了校正探測(cè)器的非均勻性,補(bǔ)償輻射響應(yīng)非線性,提出了一種基于梯度場(chǎng)景的非均勻性校正方法。給出了探測(cè)器輻射響應(yīng)非均勻性的觀測(cè)模型;以標(biāo)準(zhǔn)黑體和梯度場(chǎng)景作為參考源,在理論上推導(dǎo)出校正系數(shù)表達(dá)式;利用原理樣機(jī)進(jìn)行了外場(chǎng)實(shí)驗(yàn),并探測(cè)民航客機(jī)目標(biāo)。實(shí)驗(yàn)結(jié)果表明:與基于黑體的兩點(diǎn)校正方法相比,利用本文方法進(jìn)行非均勻性校正后的圖像,局部標(biāo)準(zhǔn)差峰值由8.57降低到2.39;對(duì)于相距50.64km的空中客車A319型客機(jī),目標(biāo)的信雜比由4.87提高到11.22。本文算法可以有效降低圖像局部標(biāo)準(zhǔn)差,適用于機(jī)載紅外預(yù)警系統(tǒng)。
[Abstract]:Long-wave infrared detectors are often used in airborne infrared early warning systems and are often disturbed by serious non-uniform noise. In order to correct the nonuniformity of detector and compensate the nonlinearity of radiation response, a gradient scene based nonuniformity correction method is proposed. The observation model of the nonuniformity of the detector's radiation response is given, the calibration coefficient expression is derived theoretically using the standard blackbody and gradient scene as the reference source, and the external field experiment is carried out using the principle prototype, and the target of the civil aviation airliner is detected. The experimental results show that the peak value of local standard deviation is reduced from 8.57 to 2.39 when compared with the blackbody based two-point correction method, and the peak value of local standard deviation is reduced from 8.57 to 2.39 for the Airbus A319 airliner with distance from 50.64km. Target's signal-to-clutter ratio increased from 4. 87 to 11. 22. This algorithm can effectively reduce the local standard deviation of image and is suitable for airborne infrared early warning system.
【作者單位】： 中國(guó)科學(xué)院長(zhǎng)春光學(xué)精密機(jī)械與物理研究所中國(guó)科學(xué)院航空光學(xué)成像與測(cè)量重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);中國(guó)科學(xué)院長(zhǎng)春光學(xué)精密機(jī)械與物理研究所;
【基金】：國(guó)家自然科學(xué)基金(61308099)
【分類號(hào)】：TN215;TP391.41
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本文編號(hào)：2028385