Test different size of images

[zhangqingbo1]

@neka-nat hello, in the original paper, Computational times with different resolution of the input image are tested(such as 512x512,768x768 and 1024x1024), how can I train the model with (256,256,3) then use the model to test images with arbitrary shape ？

I have tried such as change input_shape to (None, None, 3) ,But it can't work. Only can change to (512,512,3), so the model only can deal with images with shape of (512,512,3)
Can you give me some advice ?