1only batches of spatial targets supported (non-empty 3D tensors) but got targets of size: : [1, 3, 375, 1242]

Hi, I’m wondering how to create the mapping, I saw that your mapping code in the post, how did you find the mapping relationship?
And how to create my own mapping? Do you mean that I should check all color in my mask image and then find the html code :open_mouth: