一种改进的多光谱双边滤波图像融合算法

针对双边滤波图像融合算法核函数复杂、人为设计参数较多、计算时间较长的问题，文章提出一种改进的双边滤波融合算法实现彩色图像和近红外图像的融合。文章简化了双边滤波算法中的核函数，取消了人为设计参数；在对彩色图像进行双边滤波融合时，取彩色图像与近红外图像中相应像素间差异性大的作为相似度项，避免了融合图像的纹理、边缘被平滑掉。通过对实际采集的图像应用几种融合方法进行测试，表明文章提出的改进双边滤波融合方法同Eric.P等人的方法相比速度提高6倍多，且人为设计参数较少，得到的融合图像色彩同源图像色彩接近，图像细节更清晰，具有一定应用价值。

An improved multispectral bilateral filter video fusion algorithm

Algorithm is complex, the design parameter and computer time are too much based on bilateral filter video fusion. So the paper presents a technique of improved bilateral filter video fusion for color image and near IR image. In the algorithm the kernel function is redesign and design parameter is cancel. During images are fusion, the large difference of pixels is chosen in color image and near IR image. The choose method avoids that edge and texture are smoothed. Through using several method test several images the result proves that the operation speed of improving bilateral filter video fusion algorithm is sixth than the old one. The designed parameter is less than the old one. Getting the color image is natural relative luminance and the details are in focus. The means takes on a certain applying value.