基于FY-4A/AGRI的多维动态混合成像方法研究  

Study on multi-dimensional dynamic hybrid imaging technology based on FY-4A/AGRI

作　　者：鄢俊洁 瞿建华 张芳芳 郭雪星 王燕婷 YAN Jun-jie;QU Jian-hua;ZHANG Fang-fang;GUO Xue-xing;WANG Yan-ting(Beijing Huayun Shinetek Science and Technology Co.,Ltd.,Beijing 100081,China)

机构地区：[1]北京华云星地通科技有限公司,北京100081

出　　处：《气象与环境学报》2022年第6期98-105,共8页Journal of Meteorology and Environment

基　　金：中国气象局中国华云集团公司专项“美丽星球晴空数据集”(FY4A-GZY-002)项目资助。

摘　　要：通过开展多维动态混合成像方法研究,在FY-4A数据可见光真彩色成像过程中,应用通道混合方式,生成“类绿光通道”,保留数据梯度信息,避免色彩跳变,实现水平方向上的平滑无缝拼接和垂直方向上的多层图像动态叠加,为每个像元分配动态透明因子,生成质量较好的多通道彩色合成图像。利用多维动态混合成像技术生成彩色图像产品进行分析表明,白天可见光区域还原了地表的真实色彩,夜间高云呈白色,低云呈浅蓝色,较好地区分出夜间云的特性,晨昏交界处色彩过渡自然,图像产品质量较高。We made the research on multi-dimensional dynamic hybrid imaging method in this study.In the process of visible light true color imaging of FY-4A data,the channel mixing method is applied to generate a“green light channel”,which retains the data gradient information,avoids color jumps,and achieves smoothness and seamless splicing in the horizontal direction and dynamic superimposition of multi-layer images in the vertical direction.This method can assign dynamic transparency factors to each pixel and generate multi-channel color composite images with better quality.The analysis results of color image products generated by the multi-dimensional dynamic hybrid imaging technology show that the visible light region restores the true color of the surface during the day.The high clouds at night are white,and the low clouds are light blue,which can better distinguish the characteristics of the night clouds.The color transition at dawn and dusk is natural,and the image product quality is high.This technology has been widely used in the FY-4A weather imaging product production system.The system has been promoted in 43 cities and counties in China,which has promoted the in-depth application of FY-4A data in the fields of meteorology,ecological environment,and disaster reduction.

关 键 词：真彩色成像 晨昏交界 多维动态 混合成像 

分 类 号：P407.8[天文地球—大气科学及气象学]