一种改进的IHS图像融合新算法

在详细研究图像色调饱和度与强度关系的基础上,利用图像强度与色调饱和度有相似平滑度这一性质提出了一种将最小二乘原理应用到IHS图像融合中的新方法.该方法通过图像平滑度限定条件和能量守恒限定条件,使用最小二乘法估计融合后图像的色调饱和度分量.根据主观目视判断和客观评价指标对融合结果进行了比较和分析.仿真试验表明,新方法能够使融合图像具有较高的空间分辨率,能很好地保持原有多光谱图像的光谱特性;可以显著减小融合后图像的颜色偏差,从而提高了融合图像的质量.

An improved algorithm for IHS image fusion

After thoroughly study of the relationship between intensity and colour saturation information of an image,a new method applying least squares based on the fact that nearby pixels in space-time that have similar gray levels should also have similar colours is proposed.The proposed method estimates the color saturation of the fused image using least squares by similar gray level qualification and energy conversation qualification.It compares and analyses the reconstruction results by both subjective view judgment and objective estimate parameter.The simulation experiment indicates the proposed method can enhance the spatial resolution of reconstructed image,and at the same time maintain the spectrum resolution of original image and can greatly decrease the color distortion of the reconstructed image,and then improves the fusion image quality.