人工智能
计算机科学
计算机视觉
像素
特征(语言学)
光学(聚焦)
模式识别(心理学)
图像增强
图像(数学)
语言学
光学
物理
哲学
作者
Lanqing Guo,Renjie Wan,Guan‐Ming Su,Alex C. Kot,Bihan Wen
标识
DOI:10.1109/icip42928.2021.9506785
摘要
Low-light image enhancement aims at enlarging the intensity of image pixels to better match human perception and to improve the performance of subsequent vision tasks. While it is relatively easy to enlighten a globally low-light image, the lighting condition of realistic scenes is usually non-uniform and complex, e.g., some images may contain both bright and extremely dark regions, with or without rich features and information. Existing methods often generate abnormal light-enhancement results with over-exposure artifacts without proper guidance. To tackle this challenge, we propose a multi-scale feature guided attention mechanism in the deep generator, which can effectively perform a spatially-varying light enhancement. The attention map is fused by both the gray map and extracted feature map of the input image, to focus more on those dark and informative regions. Our baseline is an unsupervised generative adversarial network, which can be trained without any low/normal light image pair. Experimental results demonstrate the superiority in visual quality and performance of subsequent object detection over state-of-the-art alternatives.
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