Thank you for organizing this interesting competition.
I am very happy to join this.
I am also wondering how the models are evaluated?
As mwlan-san mentioned, all zero array shows high IOU score (val: 0.7010, test: 0.785),
I get the same results as well.
On the other hand, all one array (means all flooded area) shows "0" score.
I guess, the evaluation procedure would calculate the IoU of "not flood region:0".
If my suggestion is correct, please modify the procedure for us.
We are aware of this possible hack and we will make an announcement about it soon. Thanks for bringing it up!Posted by: Shubhankar @ May 22, 2021, 12:03 p.m.