获取HDR数据的几个地方：
Free HDRI sets for smart Image-Based Lighting sIBL Archive提供HDR图像和Ground Truth LDR图像
使用chrome浏览器的view source功能，查看archive下的所有文件view-source:http://www.hdrlabs.com/sibl/archive/
论文：Learning a Deep Single Image Contrast Enhancer from Multi-Exposure Images
提供Multiple-exposure images 和Ground Truth LDR图像
论文：Deep High Dynamic Range Imaging of Dynamic Scenes
提供HDR图像
HDR-Eye: dataset of high dynamic range images with eye tracking data
Supplementary material of paper HDR image reconstruction from a single exposure using deep CNNs provide a hdr database list
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