Correction of the false topographic perception phenomencn based on topographic normalization
- Vol. 20, Issue 4, Pages: 590-600(2016)
Published: 2016
DOI: 10.11834/jrs.20165254
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Published: 2016 ,
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[1]章皖秋,岳彩荣,袁华.利用地形正规化校正反立体现象[J].遥感学报,2016,20(04):590-600.
ZHANG Wanqiu, YUE Cairong, YUAN Hua. Correction of the false topographic perception phenomencn based on topographic normalization. [J]. Journal of Remote Sensing 20(4):590-600(2016)
影像目视判读常会遇到山脊与沟谷的凹凸感与现实相反的反立体现象。消除反立体现象
能有效提高非专业人员对遥感影像的正确使用。立足于反立体现象的成因
本文采用地形正规化模型来校正影像的反立体现象
推导出Lambertian、Cosine-Civco、c校正、b校正这4种地形正规化模型的反立体校正式;对这4种地形正规化模型的反立体校正效果进行了对比
并且与其他5种校正法也进行了对比。通过3个实验区的校正发现
这4种地形正规化模型均能校正反立体现象
但校正影像存在色调偏差;Lambertian、Cosine-Civco的反立体校正影像立体感较强
但影像色调改变较大
视觉效果偏差;c校正、b校正的校正影像在视觉效果和定量指标上都比较接近
基本保持地物光谱信息
校正效果相对较好。从定量指标来看
b校正的反立体校正影像的各指标值整体最小
一定程度代表b校正能取得相对较好的反立体校正效果。与其他方法的对比表明
c校正和b校正的反立体校正不局限于波段个数
在有效消除反立体现象的同时
能相对较好的保留地物光谱信息
有利于影像的定量应用。
False Top Ographic Perception Phenomena(FTPP)are visual obstacles in applications of remote sensing images. Thid study aims to correct FTPP for non-professionals who use these images. After the causes of FTPP were analyzed
a method was proposed for topographic normalization models to correct FTPP in remote sensing images. Four FTPP correction formula were developed based on the Lambert an model
Cosine-Civco Model
c correction
and b correction; these equations were then compared in three test areas. In addition
the FTPP correction results were compared among the four topographic normalization models and the five existing methods. Results showed that the four topographic normalization models could successfully remove FTPP in images
but introduced some spectral distortions. The FTPP correction results of the Lambert and Cosine-Civco model showed good stereoscopic effects but inferior color balance and hues. The c and b correction produced similar images with good visual effects
while retaining spectral information of ground features. Overall
the quantitative index showed that b correction was slightly better than the three other models for FTPP correction. Comparison with the five existing methods indicated that c and b correction were superior. In conclusion
the c and b correction can effectively remove FTPP in images
regardless of the number of bands involved
there by preserve the spectral information of the images for further quantitative analysis.
地形正规化Lambertian模型Cosine-Civco模型c校正b校正反立体现象校正
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