本文為本人閱讀論文《2018 PIRM Challenge on Perceptual Image Super-resolution》時寫下的閱讀筆記，看這篇paper主要是為了更深入的瞭解NIQE

本文提及，SR evaluation methodology jointly quanties accuracy and perceptual quality,（SR的評價體系應該聯合量化準確度和感知質量）the more SR methods advanced, the more it has become evident that reconstruction accuracy and perceptual quality are typically in disagreement with each other.重建精度和感知質量通常彼此不一致。更少的重建的誤差，會導致更差的視覺效果。

2018 PIRM challenge以知覺質量感知方式進行評價。define perceptual quality as the visual quality of the reconstructed image regardless of its similarity to any ground-truth image.

關於NIQE

https://blog.csdn.net/mazhitong1020/article/details/80415758

Natural image quality evaluator, NIQE——無需利用人眼評分的失真影象進行訓練在計算其區域性MSCN 歸一化影象後, 根據區域性活性選擇部分影象塊作為訓練資料, 以廣義高斯模型擬合得到模型引數作為特徵, 採用多變數高斯模型描述這些特徵, 評價過程中利用待評價影象特徵模型引數與預先建立的模型引數之間的距離來確定影象質量