有限離散剪切波域的紅外可見光圖像融合
發(fā)布時間:2019-05-21 19:07
【摘要】:針對目前圖像融合過程中的不足之處,結(jié)合有限離散剪切波具有高的方向敏感性和拋物尺度化特性,提出了一種有限離散剪切波變換下的圖像融合算法。首先對嚴格配準的多傳感器圖像進行有限離散剪切波變換,得到低頻子帶系數(shù)和不同尺度不同方向的高頻子帶系數(shù);然后對低頻子帶系數(shù)采用全局特征值和像素點之間的差異性與區(qū)域空間頻率匹配度相結(jié)合的融合算法,高頻方向子帶系數(shù)采用方向權(quán)重對比度與相對區(qū)域平均梯度和相對區(qū)域方差相結(jié)合的方案;最后通過有限離散剪切波逆變換得到融合圖像。實驗結(jié)果表明,與其他的融合算法相比較,本文算法不但有良好的主觀視覺效果,而且3幅圖像的客觀評價指標分別平均提高了0.9%、3.8%、3.1%,2.6%、3.8%、2.9%和1.5%、125%、59%,充分說明了本文融合算法的優(yōu)越性。
[Abstract]:In view of the shortcomings of the current image fusion process, an image fusion algorithm based on finite discrete shear wave transform is proposed, which combines the high direction sensitivity of finite discrete shear wave and the characteristics of parabola scaling. Firstly, the finite discrete shear wave transform is carried out on the strictly registered multi-sensor images, and the low frequency subband coefficients and the high frequency subband coefficients in different scales and different directions are obtained. Then the low frequency subband coefficient is combined with the difference between global eigenvalues and pixels and the regional spatial frequency matching degree. The high frequency direction subband coefficient adopts the scheme of combining the contrast of direction weight with the average gradient of relative region and the variance of relative region. Finally, the fusion image is obtained by finite discrete shear wave inverse transform. The experimental results show that, compared with other fusion algorithms, the proposed algorithm not only has a good subjective visual effect, but also improves the objective evaluation index of the three images by 0.9%, 3.8%, 3.1% and 2.6%, respectively. 3.8%, 2.9% and 1.5%, 125% and 59%, which fully demonstrates the advantages of the fusion algorithm in this paper.
【作者單位】: 西安建筑科技大學(xué)理學(xué)院;
【基金】:陜西省自然科學(xué)基金資助項目(No.2015JM1024;No.2013JK0568)~~
【分類號】:TP391.41
[Abstract]:In view of the shortcomings of the current image fusion process, an image fusion algorithm based on finite discrete shear wave transform is proposed, which combines the high direction sensitivity of finite discrete shear wave and the characteristics of parabola scaling. Firstly, the finite discrete shear wave transform is carried out on the strictly registered multi-sensor images, and the low frequency subband coefficients and the high frequency subband coefficients in different scales and different directions are obtained. Then the low frequency subband coefficient is combined with the difference between global eigenvalues and pixels and the regional spatial frequency matching degree. The high frequency direction subband coefficient adopts the scheme of combining the contrast of direction weight with the average gradient of relative region and the variance of relative region. Finally, the fusion image is obtained by finite discrete shear wave inverse transform. The experimental results show that, compared with other fusion algorithms, the proposed algorithm not only has a good subjective visual effect, but also improves the objective evaluation index of the three images by 0.9%, 3.8%, 3.1% and 2.6%, respectively. 3.8%, 2.9% and 1.5%, 125% and 59%, which fully demonstrates the advantages of the fusion algorithm in this paper.
【作者單位】: 西安建筑科技大學(xué)理學(xué)院;
【基金】:陜西省自然科學(xué)基金資助項目(No.2015JM1024;No.2013JK0568)~~
【分類號】:TP391.41
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