本文選題：信息處理技術(shù) + 梯度天空背景　； 參考：《吉林大學(xué)學(xué)報(bào)(工學(xué)版)》2017年05期

【摘要】：針對(duì)黑體兩點(diǎn)校正方法不適用于校正梯度天空背景的問題,提出一種新的基于梯度天空背景的兩點(diǎn)校正方法。首先,采用鄰域像素替代法剔除位置固定不變的盲元;然后,利用紅外焦平面探測器拍得的兩幅不同俯仰角度的純凈天空?qǐng)D像作為兩個(gè)溫度點(diǎn),進(jìn)行兩點(diǎn)校正獲得增益系數(shù)和偏置系數(shù);最后,通過修正這兩個(gè)系數(shù)剔除少量隨機(jī)噪點(diǎn)。實(shí)驗(yàn)結(jié)果驗(yàn)證了該方法的有效性。本文在校正基礎(chǔ)上還提出了一種小窗口雙邊濾波和梯度模板聯(lián)合檢測算法,用于探測暗弱點(diǎn)目標(biāo)。首先采用小窗口的雙邊濾波去除高斯噪點(diǎn),然后與梯度模板做卷積,自適應(yīng)閾值分割檢測出暗弱點(diǎn)目標(biāo)。實(shí)驗(yàn)結(jié)果表明,提出的模板算法對(duì)復(fù)雜背景的抑制作用較強(qiáng),可有效提高目標(biāo)的信噪比,而且算法復(fù)雜度不高,易于實(shí)時(shí)實(shí)現(xiàn)。
[Abstract]:Aiming at the problem that blackbody two-point correction method is not suitable for correcting gradient sky background, a new two-point correction method based on gradient sky background is proposed.Firstly, neighborhood pixel substitution method is used to eliminate blind elements with fixed position, and then, two pure sky images with different pitch angles are used as two temperature points.Gain coefficient and bias coefficient are obtained by two-point correction, and a small amount of random noise is eliminated by modifying these two coefficients.The experimental results show that the method is effective.On the basis of correction, a small window bilateral filter and gradient template detection algorithm are proposed to detect dark vulnerable targets.Firstly, Gao Si noise is removed by two-sided filtering of small windows, then convolution with gradient template is performed, and adaptive threshold segmentation is used to detect dark weakness targets.The experimental results show that the proposed template algorithm can suppress the complex background effectively and improve the SNR of the target effectively. Moreover, the complexity of the proposed algorithm is not high and the algorithm is easy to realize in real time.
【作者單位】： 中國科學(xué)院長春光學(xué)精密機(jī)械與物理研究所;中國科學(xué)院航空光學(xué)成像與測量重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);吉林大學(xué)儀器科學(xué)與電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(61308099) 吉林省重大科技攻關(guān)專項(xiàng)項(xiàng)目(11ZDGG001) 國家重點(diǎn)研發(fā)計(jì)劃(2016YFB0501003) 上海市科委重點(diǎn)項(xiàng)目(16DZ1120400)
【分類號(hào)】：TN215;TP391.41

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