摘要
太阳耀斑掩盖了水体的真实物理特性,严重干扰了水下特征的获取。根据被耀斑污染的像素和邻近未污染像素间的辐射差值,获得大气组分的吸收特征,并调节大气辐射传输模型中的模型参量,进而得到大气透射率。分析了影响耀斑污染程度的主要因素,依据近红外波段离水辐亮度近似为零,求出水体受耀斑污染程度的空间分布,据此进行耀斑去除,得到未被耀斑污染的图像。结果表明,应用该方法提取离水辐亮度,去除耀斑的效果较好。
Sun glint masks real physical properties of water underwater characteristics. Based on the difference between the the atmospheric absorption feature which can be used to tune and severely interferes with the acquisition of glint-contaminated pixel and nearby nonglint pixel, the input parameters of the atmospheric radiative transfer model is obtained, then the atmospheric transmissivity is calculated, and the major factors which influence the degree of glint contamination are discussed in detail. According to the fact that the water-leaving radiance value in near-infrared bands is negligible, the spatial distribution of the glint contamination is solved, the glint is removed, and the non-contaminated image is displayed. It is applied to extract the water-leaving radiance, and the experimental results prove the validity of this algorithm.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2008年第4期664-668,共5页
Acta Optica Sinica
基金
国家自然科学基金(604777042)资助课题
关键词
遥感
耀斑去除
水体分割
大气透射率
离水辐亮度
remote sensing
glint removal
water segmentation
atmospheric transmissivity, water-leaving radiance
