  The photographic dataset collected for the Helsinki Deblur Challenge 2021
(HDC2021) contains pairs of images taken by two identical cameras of the same
target but with different conditions. One camera is always in focus and
produces sharp and low-noise images the other camera produces blurred and noisy
images as it is gradually more and more out of focus and has a higher ISO
setting. Even though the dataset was designed and captured with the HDC2021 in
mind it can be used for any testing and benchmarking of image deblurring
algorithms. The data is available here: https://doi.org/10.5281/zenodo.477228
