联合概率密度脊提取的影像镶嵌色彩一致性处理方法

针对大区域待镶嵌遥感影像之间存在亮度分布和对比度不一致的问题，提出了一种联合概率密度脊提取的色彩一致性处理方法。统计两景影像重叠区域对应波段亮度值的联合概率密度，并从中提取通过“脊”的直线作为回归方程，对输入影像进行处理，使得影像间具有类似的对比度和亮度分布。选取TM数据进行了实验，结果表明：镶嵌结果色彩均匀、视觉特征良好；与传统方法相比具有较好的稳定性和统计特征。

Ridge of Joint Probability Density Based Color Normalization Method for Image Mosaic

Considering the problem of the the chromaticity among a collection of remote sensing images that are to create image mosaics often differs，a rigde based color normalization method is proposed. The joint probability desity (PD) of DN values in the overlapped area of two images is calculated, then line equation across the ridge of PD is extracted as the regression model , the input image is corrected and make all the image have similar contrast and chromaticity distribution. Landsat TM data was selected to test the method, the result shows the color is uniform and have good visual features. The proposed method is more robust and has better statistical characteristics than traditinal method.