Multi-spectral image fusion using quincunx-sampled directional filter bank

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.