论文标题
使用卷积神经网络的多光谱卫星图像的超分辨率
Super-resolution of multispectral satellite images using convolutional neural networks
论文作者
论文摘要
超分辨率旨在通过算法手段来增加图像分辨率,并且由于计算机视觉和深度学习领域的进步,近年来在近年来取得了进步。基于各种架构的卷积神经网络已应用于该问题,例如自动编码器和剩余网络。尽管大多数研究的重点是仅由RGB颜色通道组成的照片的处理,但很少发现专注于多波段,分析卫星图像的工作。卫星图像通常包含一个全型带,其空间分辨率较高,但光谱分辨率低于其他频段。在遥感领域,在卫星图像上施加泛贴的悠久传统,即通过将多光谱带与Panchronic Band合并,将多光谱带带到更高的空间分辨率。据我们所知,到目前为止,还没有利用全天乐队的超级分辨率的方法。在本文中,我们提出了一种使用成对的低分辨率多光谱和高分辨率板抛光图像图块来训练最先进的CNN的方法,以创建超级分辨的分析图像。派生的质量指标表明该方法改善了处理后图像的信息内容。我们将四个CNN体系结构创建的结果与Rednet30表现最好的结果进行了比较。
Super-resolution aims at increasing image resolution by algorithmic means and has progressed over the recent years due to advances in the fields of computer vision and deep learning. Convolutional Neural Networks based on a variety of architectures have been applied to the problem, e.g. autoencoders and residual networks. While most research focuses on the processing of photographs consisting only of RGB color channels, little work can be found concentrating on multi-band, analytic satellite imagery. Satellite images often include a panchromatic band, which has higher spatial resolution but lower spectral resolution than the other bands. In the field of remote sensing, there is a long tradition of applying pan-sharpening to satellite images, i.e. bringing the multispectral bands to the higher spatial resolution by merging them with the panchromatic band. To our knowledge there are so far no approaches to super-resolution which take advantage of the panchromatic band. In this paper we propose a method to train state-of-the-art CNNs using pairs of lower-resolution multispectral and high-resolution pan-sharpened image tiles in order to create super-resolved analytic images. The derived quality metrics show that the method improves information content of the processed images. We compare the results created by four CNN architectures, with RedNet30 performing best.