摘要
国内外高端航测相机不断追求扩展摄影幅面以提升作业效率,但探测器制造能力对相机单一幅面扩展形成了制约,多镜头、多探测器拼接技术成为大幅面高端航测相机的重要发展路线。文章针对拼接式航测相机虚拟拼接影像各子影像亮度不一致的问题,提出一种无需输入先验参数,自主选择参考子影像,使用子影像间设计重叠区域亮度统计特征(均值、标准差)一致性约束,构建线性校正模型,通过最小二乘优化求解各个子影像的校正参数。文章方法针对虚拟拼接影像,可以无先验、自适应地计算最优校正参数,有效抑制拼接式相机多镜头、多探测器间辐射不一致的现象,提升影像品质。经试验验证,提出方法与现有算法相比,校正后的虚拟拼接影像的均匀性在定量分析与视觉效果两方面均有显著提升。
Advanced aerial mapping cameras at home and abroad are constantly pursuing the expansion of the photographic format to improve operational efficiency.However,the manufacturing capacity of detectors restricts the expansion of the single format of the camera.Multi-lens and multi-detector splicing technology has become an important development route for large-format advanced aerial mapping cameras.A method without priori parameters is proposed,which independently selects the reference sub-images,uses the consistency constraints of the brightness statistical features(image mean,variance)in the overlapping regions to build a linear correction model,and solves the problem of each sub-image through least squares optimization correction parameters.For different virtual spliced images,the method has no prior and self-adaptive calculation of optimal correction parameters,and the calculation amount is small,which can quickly and effectively suppress the phenomenon of radiation inconsistency among multiple lenses and multiple detectors of spliced cameras,and improve image quality.Experiment shows that compared with the existing algorithm,the uniformity of the corrected virtual stitched image is significantly improved in both quantitative analysis and visual effect.
作者
尚志鸣
姜湾
刘秀
文高进
钟灿
陈捷
SHANG Zhiming;JIANG Wan;LIU Xiu;WEN Gaojin;ZHONG Can;CHEN Jie(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;National Museum,Beijing 100079,China;Navy Submarine Academy,Qingdao 266000,China)
出处
《航天返回与遥感》
CSCD
北大核心
2023年第5期83-90,共8页
Spacecraft Recovery & Remote Sensing
关键词
辐射一致性校正
亮度特征一致性约束
最小二乘法
拼接式航摄相机
radiation consistency correction
luminance feature consistency constraints
least squares optimization
splicing aerial mapping camera
