标题:
基于Wallis原理改进的匀光算法Improved Dodging Algorithm Based on Wallis Principle
作者:
罗思
关键字:
光照不均匀, 匀光, Wallis原理, 反差不均匀, 块效应Uneven Illumination, Dodging, Wallis Principle, Uneven Contrast Phenomenon, Block Effect
期刊名称:
《Geomatics Science and Technology》, Vol.3 No.3, 2015-07-21
摘要:
光照不均匀现象是遥感影像获取中常见的一个问题，光照不均匀影像往往存在反差不均匀现象，而Wallis滤波器对反差不均匀影像有特殊作用，故可以采用Wallis原理对光照和反差不均匀影像进行处理。经典的Wallis匀光结果影像也存在“块效应”和整体色调偏移等问题，本文提出一种基于Wallis原理改进的匀光算法，在消除光照不均的情况下也能改善反差不均匀现象。实验表明，改进后的匀光算法处理的结果影像能有效的实现光照和反差一致。
The uneven illumination phenomenon is a common problem in remote sensing image acquisition, and the uneven illumination image often has uneven contrast phenomenon, while Wallis filter has a special role for the uneven contrast image, it can adopt the Wallis principle to process the light and uneven contrast image. The results of the classical Wallis algorithm also have some problems, such as the “block effect” and the migration of overall tone. This paper proposes an improved dodging algorithm based on Wallis principle, and the experiment results show the result image which is processed by the improved dodging algorithm can realize illumination consistency and contrast effectively.