遥感数字图像无损假彩色合成

Remote sensing digital image non-destructive false color synthesis

为解决商用软件和相关方法在进行遥感数字图像假彩色合成时存在像素点亮度值丢失、异常亮点过多等问题,采用理论分析和实验对比的方法,提出无损平移双向对比度拉伸遥感数字图像假彩色合成增强方法.研究结果表明:该方法适用于不同卫星不同波段图像的假彩色合成,而且对整幅图像有效像素亮度值无损增强.经实验对比,该方法的处理效果优于商用软件,具有合成图像亮度、对比度适中,目视判读效果良好,能真实反映出地表地貌的假彩色特征等优点,从而有效地辅助相关地学问题的解决.

In order to solve the problems of remote sensing digital image false color synthesis in commercial software and related methods, such as the missing of the pixels intensity value, redundancy of the abnormal spot, etc., this study adopted the methods of theoretical analysis and experimental, and put forward the enhancing remote sensing digital image pseudo color using nondestructive translational two-way contrast stretching. The results show that the method applies to false color composite of varying waveband images of different satellites and enhances effective pixel brightness values without any damage to the whole image. By the comparisons of two methods, the treatment effect of this method is better than that of the commercial software, with moderate synthetic image brightness and contrast ratio, good visual interpretation effect and a real reflection of the false color features of the surface topography, which is effectively helping in solving problems related to geoscience.