Abstract: Using a characteristic that quincunx-sampled directional filter can provide rich direction information, a multi-spectral image fusion method is proposed based on the directional filter bank. An original multi-band image is converted from RGB mode to IHS mode through IHS transform. Quincunx-sampled directional filter transform is performed on the component I and the panchromatic image, corresponding low frequency sub-image and high frequency different directional sub-image are gained, and they are fused according to some fusion rules. The new I component can be obtained. A new RGB image is gotten through an inverse IHS transform. The experimental results show that the method has a better visual effect in image edge details, and has better fusion effect than IHS fusion method and the fusion method based on quincunx-sampled discrete wavelet transform.

Key words: quincunx-sampled directional filter bank, multi-spectral image fusion, quincunx-sampled discrete wavelet transform

摘要： 利用梅花采样方向滤波器能够提供丰富的方向信息的特点，提出了一种基于此方向滤波器组的多光谱图像融合方法。该方法通过IHS变换，将多波段影像从RGB空间转换到IHS空间，对I分量及全色影像进行梅花采样方向滤波器变换，得到相应的低频子图像和高频不同方向的子图像，将它们按一定的融合规则得到新的I分量，通过IHS逆变换得到RGB融合图像。实验结果表明，该方法在图像边缘等细节上有较好的视觉效果，取得了优于IHS方法和基于梅花形采样离散小波变换方法的融合效果。

关键词: 梅花采样方向滤波器组, 多光谱图像融合, 梅花形采样离散小波变换