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Generative Adversarial Networks based Super Resolution of Satellite Aircraft Imagery

机译:基于生成对抗网络的卫星飞机图像超分辨率

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Generative Adversarial Networks (GANs) are one of the most popular Machine Learning algorithms developed inrecent times, and are a class of neural networks that are used in unsupervised machine learning. The advantageof unsupervised machine learning approaches such as GANs is that they do not need a large amount of labeleddata, which is costly and time consuming. GANs may be used in a variety of applications, including imagesynthesis, semantic image editing, style transfer, image super-resolution and classication. In this work, GANsare utilized to solve the single image super-resolution problem. This approach in literature is referred to assuper resolution GANs (SRGAN), and employs a perceptual loss function which consists of an adversarial lossand a content loss. The adversarial loss pushes the solution to the natural image manifold using a discriminatornetwork that is trained to dierentiate between the super-resolved images and the original photo-realistic images,and the content loss is motivated by the perceptual similarity and not the similarity in the pixel space. Thispaper presents implementation of SRGAN using Deep convolution network applied to both the aerial and satelliteimagery of the aircrafts. The results thus obtained are compared with traditional super resolution methods. Theresulting estimates of SRGAN are compared against the traditional methods using peak signal to noise ratio(PSNR) and structure similarity index metric (SSIM). The PSNR and SSIM of SRGAN estimates are similarto traditional method such as Bicubic interpolation but traditional methods are often lacking high-frequencydetails and are perceptually unsatisfying in the sense that they fail to match the delity expected at the higherresolution.
机译:生成对抗网络(GAN)是在 是最近在无监督机器学习中使用的一类神经网络。优势 诸如GAN之类的无监督机器学习方法的原因在于它们不需要大量的标记 数据,这既昂贵又费时。 GAN可以用于多种应用,包括图像 合成,语义图像编辑,样式转换,图像超分辨率和经典化。在这项工作中,GAN 用于解决单图像超分辨率问题。文献中这种方法称为 超分辨率GAN(SRGAN),并采用感知损失功能,该功能由对抗性损失组成 和内容丢失。对抗性损失使用鉴别器将解决方案推向自然图像流形 经过训练以区分超分辨图像和原始逼真的图像的网络, 内容损失是由像素空间中的感知相似性而不是相似性引起的。这 论文提出了将深卷积网络应用于航空和卫星的SRGAN的实现 飞机的图像。将由此获得的结果与传统的超分辨率方法进行比较。这 SRGAN的最终估计值与使用峰值信噪比的传统方法进行了比较 (PSNR)和结构相似性指标(SSIM)。 SRGAN估计的PSNR和SSIM相似 与传统方法(例如双三次插值)相比,但传统方法通常缺乏高频 细节,并且在感觉上不令人满意,因为它们无法满足较高期望值的要求 解析度。

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