基于透射变换和二维指向镜的大视场光谱成像研究 |
投稿时间:2017-04-05 修订日期:2017-04-10 点此下载全文 |
引用本文:徐映宇.基于透射变换和二维指向镜的大视场光谱成像研究[J].红外,2017,38(8):8~13 |
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基金项目:国家自然科学基金项目(21105109) |
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中文摘要:为了对大视场范围内的目标进行
光谱成像,人们通常采用二维指向镜和面阵凝视光谱仪相结合
的技术途径。当用二维指向镜对近距离目标进行成像时,在不同方位
角与俯仰角下产生的像旋和畸变等都不同,从而给后续处理带来了
困难。因此需要先建立目标实际坐标系、探测器图像坐
标系和俯仰方位角三者之间的光学传递模型。根据该
模型即可得到透射畸变图像与真实图像之间的变换关系。然后通
过透射变换对透射畸变图像进行正视校正,便可对
大视场图像进行拼接。外场实验结果表明,该方法可行性
强,简单易行,稳定性好。 |
中文关键词:二维指向镜 凝视成像 透射变换 大视场成像 |
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Study of Large Field Spectral Imaging Based on Transmission Transform and Two-dimensional Pointing Mirror |
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Abstract:To achieve the spectral imaging of
an object in a large field of view, the technology path
which combines a two-dimensional pointing mirror with a
staring spectrometer is usually used. However, when the
two-dimensional pointing mirror is used to image
close objects, the image rotation and distortion generated
at different azimuths and pitch angles are different.
Therefore, it is necessary to establish an optical transfer
model among the actual object coordinate system, the
detector image coordinate system and the azimuth and
pitching angle firstly. According to the optical transfer
model, the transformation relationship between the transmission
distortion image and the real image can be obtained. Then,
after the transmission distortion image is corrected by
perspective transmission, image stitching can be implemented
on the large field-of-view image. The experimental results
show that the method is feasible, easily implemented and stable. |
keywords:two-dimensional pointing mirror staring imaging transmission transform large field-of-view imaging |
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