High‐resolution images from compressed low‐resolution video: Motion estimation and observable pixels
High‐resolution images from compressed low‐resolution video: Motion estimation and observable pixels
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DOI：
10.1002/ima.20008
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发表时间：
2004
影响因子：
3.3
通讯作者：
Luis D. Alvarez;J. Mateos;R. Molina;A. Katsaggelos
中科院分区：
文献类型：
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作者：
Luis D. Alvarez;J. Mateos;R. Molina;A. Katsaggelos
在这篇文章中，我们解决了从压缩的低分辨率（LR）视频序列中获得高分辨率（HR）图像的问题。运动信息在解决这个问题中起着至关重要的作用，我们确定序列中的哪些像素为计算高分辨率图像提供了有用的信息。混合运动补偿视频压缩方法的比特流包括低分辨率的运动补偿图像;因此，我们还研究了这些图像中的哪些像素应该用于提高重建图像的质量。一旦检测到低分辨率和运动补偿序列中的有用（可观察）像素，我们就修改采集模型以仅考虑这些观察。该方法在真实的压缩视频序列上进行了测试，并报告了改进的性能。© 2004 Wiley Periodicals，Inc. Int J Imaging Syst Technol 14，58-66，2004;在线发表于Wiley InterScience（www.interscience.wiley.com）。DOI 10.1002/ima.20008
In this article, we address the problem of obtaining a high‐resolution (HR) image from a compressed low‐resolution (LR) video sequence. Motion information plays a critical role in solving this problem, and we determine which pixels in the sequence provide useful information for calculating the high‐resolution image. The bit stream of hybrid motion compensated video compression methods includes low‐resolution motion‐compensated images; we therefore also study which pixels in these images should be used to increase the quality of the reconstructed image. Once the useful (observable) pixels in the low‐resolution and motion‐compensated sequences have been detected, we modify the acquisition model to only account for these observations. The proposed approach is tested on real compressed video sequences and the improved performance is reported. © 2004 Wiley Periodicals, Inc. Int J Imaging Syst Technol 14, 58–66, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ima.20008