The 14 bit to 8 bit downsampling technique from [61].

The 14 bit to 8 bit downsampling technique from [61].

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This study is inspired by the widely used algorithm for real-time optical flow, the sparse Lucas–Kanade, by applying a feature extractor to decrease the computational requirement of optical flow based neural networks from real-world thermal aerial imagery. Although deep-learning-based algorithms have achieved state-of-the-art accuracy and have outp...

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... solve this problem, we generated ground truth from real-world thermal 14 bit data we had collected [60,62]. The 14 bit raw thermal data were downsampled to 8 bit with our technique as shown in Figure 4. After that, the traditional dense optical flow technique, Farneback [24], was used to generate ground truth from the images. ...

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