In this paper, we propose a deep generative adversarial network for
super-resolution considering the trade-off between perception and distortion.
Based on good performance of a recently developed model for super-resolution,
i.e., deep residual network using enhanced upscale modules (EUSR), the proposed
model is trained to improve perceptual performance with only slight increase of
distortion. For this purpose, together with the conventional content loss,
i.e., reconstruction loss such as L1 or L2, we consider additional losses in
the training phase, which are the discrete cosine transform coefficients loss
and differential content loss. These consider perceptual part in the content
loss, i.e., consideration of proper high frequency components is helpful for
the trade-off problem in super-resolution. The experimental results show that
our proposed model has good performance for both perception and distortion, and
is effective in perceptual super-resolution applications.

本论文提出了一种深度生成对抗网络用于超分辨率，考虑了感知与失真之间的权衡，采用传统内容损失的基础上，使用离散余弦变换系数损失和差分内容损失来考虑内容感知，实现高分辨率图像的恢复。实验结果表明该模型在恢复图像的视觉效果和失真程度方面具有良好的性能，是一种有效的感知超分辨率应用算法。

基于生成对抗网络的图像超分辨率技术研究：以感知内容损失为依据

Generative adversarial network-based image super-resolution using  perceptual content losses

The deep generative adversarial networks (GAN) recently have been shown to be
promising for different computer vision applications, like image edit- ing,
synthesizing high resolution images, generating videos, etc. These networks and
the corresponding learning scheme can handle various visual space map- pings.
We approach GANs with a novel training method and learning objective, to
discover multiple object instances for three cases: 1) synthesizing a picture
of a specific object within a cluttered scene; 2) localizing different
categories in images for weakly supervised object detection; and 3) improving
object discov- ery in object detection pipelines. A crucial advantage of our
method is that it learns a new deep similarity metric, to distinguish multiple
objects in one im- age. We demonstrate that the network can act as an
encoder-decoder generating parts of an image which contain an object, or as a
modified deep CNN to rep- resent images for object detection in supervised and
weakly supervised scheme. Our ranking GAN offers a novel way to search through
images for object specific patterns. We have conducted experiments for
different scenarios and demonstrate the method performance for object
synthesizing and weakly supervised object detection and classification using
the MS-COCO and PASCAL VOC datasets.

本文介绍了一种新颖的网络训练方法和学习目标，采用深度生成对抗网络以及新的相似度度量方法，用于发现图片中的多个对象实例、弱监督对象检测及排名 GAN，以实现对应用的提高和优化。