whats the difference with dice ?

[argman]

Thanks for this great work, but i canno understand, I think dice is also kind of optimizing iou, so whats the difference ?

[bermanmaxim]

Dice is also a measure of performance based on discrete predictions. I think you are referring to "soft-Dice", often used to optimize dice. In practice we found that these naïve continuous versions of the discrete loss perform worse than our surrogate.