The dataset NH-HAZE was proposed last year. It is similar with the dataset proposed this year. I have not used it yet.
My question is, should I use NH-HAZE?
All the participants are allowed to use extra data for training.
If you consider that using extra data helps your solution to achieve better performance then please feel free to use extra data and let us know about that.
For the final test phase ranking all the solutions will require a description of the train data used.
The ranked solutions will need to provide the factsheet, the codes/executables, and the test image results.