دانلود مقاله ISI انگلیسی شماره 104808
ترجمه فارسی عنوان مقاله

ثبت باند فرمت های قابل تنظیم فریم های تصویربرداری پهنای بمب نفوذگر در صحنه های پیچیده

عنوان انگلیسی
Band registration of tuneable frame format hyperspectral UAV imagers in complex scenes
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
104808 2017 14 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : ISPRS Journal of Photogrammetry and Remote Sensing, Volume 134, December 2017, Pages 96-109

پیش نمایش مقاله
پیش نمایش مقاله  ثبت باند فرمت های قابل تنظیم فریم های تصویربرداری پهنای بمب نفوذگر در صحنه های پیچیده

چکیده انگلیسی

A recent revolution in miniaturised sensor technology has provided markets with novel hyperspectral imagers operating in the frame format principle. In the case of unmanned aerial vehicle (UAV) based remote sensing, the frame format technology is highly attractive in comparison to the commonly utilised pushbroom scanning technology, because it offers better stability and the possibility to capture stereoscopic data sets, bringing an opportunity for 3D hyperspectral object reconstruction. Tuneable filters are one of the approaches for capturing multi- or hyperspectral frame images. The individual bands are not aligned when operating a sensor based on tuneable filters from a mobile platform, such as UAV, because the full spectrum recording is carried out in the time-sequential principle. The objective of this investigation was to study the aspects of band registration of an imager based on tuneable filters and to develop a rigorous and efficient approach for band registration in complex 3D scenes, such as forests. The method first determines the orientations of selected reference bands and reconstructs the 3D scene using structure-from-motion and dense image matching technologies. The bands, without orientation, are then matched to the oriented bands accounting the 3D scene to provide exterior orientations, and afterwards, hyperspectral orthomosaics, or hyperspectral point clouds, are calculated. The uncertainty aspects of the novel approach were studied. An empirical assessment was carried out in a forested environment using hyperspectral images captured with a hyperspectral 2D frame format camera, based on a tuneable Fabry-Pérot interferometer (FPI) on board a multicopter and supported by a high spatial resolution consumer colour camera. A theoretical assessment showed that the method was capable of providing band registration accuracy better than 0.5-pixel size. The empirical assessment proved the performance and showed that, with the novel method, most parts of the band misalignments were less than the pixel size. Furthermore, it was shown that the performance of the band alignment was dependent on the spatial distance from the reference band.