Data Collection
We use Canon EOS 5D Mark IV to capture the data. The resolution of captured images is set to 6720 × 4480. To capture low/normal-light image pairs, the camera was mounted on a sturdy tripod and controlled remotely via a mobile APP. The camera was not touched between the capture process of normal-light and low-light images to avoid vibration. For each pair, we first take the normal-light image and fix ISO and aperture. Then the low-light images are captured by changing the shutter (exposure time) to simulate low-light conditions. We capture our dataset indoor and outdoor to increase the richness of the scene, where include both natural scenarios and manual builds.
Dataset characteristics
208 scenes & 832 pairs
It contains 832 image pairs in 208 scenes, which means we have 4 different exposure ratios (8,16,32,64) for the same scene.
High resolution
Our dataset stands out with its high resolution of 6720x4480, surpassing the common resolutions (below 1920x1080) found in other datasets. This higher resolution captures finer details, offering a more comprehensive analysis for low-light enhancement.
RAW image as input
Raw images as input. The use of unprocessed raw sensor data as the input format leverages the higher bit-depth and superior intensity tolerance of raw data, effectively addressing the common issue of insufficient scene information in low-light enhancement.