This dataset is a single-frame dataset released by the NTIRE 2021 challenge. HDR stands for High Dynamic Range, which means high dynamic range imaging. The NTIRE 2021-SingleHDR dataset consists of input LDR low, medium, and long exposed triplets, and the corresponding HDR ground-truth image, which is consistent with the medium input frame in terms of time and exposure level.

At the same time, the dataset also includes multiple scenes, such as outdoor, indoor, daytime, night, etc., with complex and changeable lighting, emphasizing complex moving light sources and changing brightness levels in the same scene (such as high-radiation light sources, lights combined with very dark shadow areas).

The dataset includes:

• Training data (1,494 input LDR triplet and their respective HDR GT)
• Validation data (60 input LDR triplet and their respective HDR GT)
• Test Data