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Zero-Reference Deep Curve Estimation for Low-Light Image ...

Zero-Reference Deep Curve Estimation for Low-Light Image EnhancementChunle Guo1,2 Chongyi Li1,2 Jichang Guo1 Chen Change Loy3 Junhui Hou2 Sam Kwong2 Runmin Cong41 BIIT Lab, Tianjin University2 City University of Hong Kong3 Nanyang Technological University4 Beijing Jiaotong paper presents a novel method, Zero-ReferenceDeep Curve Estimation (Zero-DCE), which formulates lightenhancement as a task of Image -specific Curve estimationwith a deep network. Our method trains a lightweight deepnetwork, DCE-Net, to estimate pixel-wise and high-ordercurves for dynamic range adjustment of a given Image . Thecurve Estimation is specially designed, considering pixelvalue range, monotonicity, and differentiability.

a low-light image as input and produces high-order curves as its output. These curves are then used for pixel-wise ad-justment on the dynamic range of the input to obtain an en-hanced image. The curveestimation is carefully formulated so that it maintains the range of the enhanced image and p-reserves the contrast of neighboring pixels ...

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