激光与红外
激光與紅外
격광여홍외
LASER & INFRARED
2014年
9期
1055-1059
,共5页
非下采样轮廓波变换(NSCT)%图像融合%红外和可见光图像%四阶相关系数
非下採樣輪廓波變換(NSCT)%圖像融閤%紅外和可見光圖像%四階相關繫數
비하채양륜곽파변환(NSCT)%도상융합%홍외화가견광도상%사계상관계수
nonsubsampled contourlet transform%image fusion%infrared and visible light image%fourth-order correla-tion coefficient
采用非下采样 Contourlet 变换（NSCT）模型提出了基于四阶相关系数的红外与可见光图像融合方法。首先对融合图像进行多尺度和多方向分解；对于低频分量，充分考虑红外和可见光图像物理特性的差异，采用基于区域平均梯度的融合策略；对高频分量采用四阶相关系数匹配策略来选择合适的高频系数；最后对融合后的系数进行 NSCT 逆变换得到融合图像。实验结果表明，该融合算法能更好地保留目标信息，同时也显著地提高了图像的信息量，在主观视觉效果和客观评价方面具有较好的融合性能。
採用非下採樣 Contourlet 變換（NSCT）模型提齣瞭基于四階相關繫數的紅外與可見光圖像融閤方法。首先對融閤圖像進行多呎度和多方嚮分解；對于低頻分量，充分攷慮紅外和可見光圖像物理特性的差異，採用基于區域平均梯度的融閤策略；對高頻分量採用四階相關繫數匹配策略來選擇閤適的高頻繫數；最後對融閤後的繫數進行 NSCT 逆變換得到融閤圖像。實驗結果錶明，該融閤算法能更好地保留目標信息，同時也顯著地提高瞭圖像的信息量，在主觀視覺效果和客觀評價方麵具有較好的融閤性能。
채용비하채양 Contourlet 변환（NSCT）모형제출료기우사계상관계수적홍외여가견광도상융합방법。수선대융합도상진행다척도화다방향분해；대우저빈분량，충분고필홍외화가견광도상물리특성적차이，채용기우구역평균제도적융합책략；대고빈분량채용사계상관계수필배책략래선택합괄적고빈계수；최후대융합후적계수진행 NSCT 역변환득도융합도상。실험결과표명，해융합산법능경호지보류목표신식，동시야현저지제고료도상적신식량，재주관시각효과화객관평개방면구유교호적융합성능。
In this paper,a new method based on nonsubsampled contourlet transform (NSCT)is proposed to fuse the infrared image and the visible light image.Firstly,the NSCT is performed on the original images to obtain the sub-bands coefficient in different scales and various directions.Considering the physical characteristics of two original im-ages,fusion strategy based on the regional average gradient is used for the low frequency sub-band coefficients.For the high frequency sub-band coefficients,the fourth-order correlation coefficient match strategy is used to select the suitable high-frequency coefficients.Finally,the fused coefficients are reconstructed to obtain the fused image.The experiment results show that the proposed method performs better in keeping and improving the target information,and it has better fusion performance in subjective visual effect and objective evaluation.
