Thank you for answer.
Before start traning i have set anchor sizes and aspect ratio for example:
(I didn’t give it according to a rule, I just wanted it to learn in different scales.)
 anchor_sizes : ((32,), (64,), (128,), (256,), (512,))
 aspect_ratio : ((0.15, 0.2, 0.25, 0.5, 1.0, 2.0, 2.5, 3.0, 4.0, 5.0 ,6.0, 8.0),)

I thought it might work but it didn’t yield any results
Besides, These anchor settings how i can make according to my datasets.
My Dataset information,
images 512x1024 and generally labeled objects large 30x120, 45x150 etc
Critic,
I don’t want to give resize images or tile images while prediction because i am missing object or can’t merging detected objects in tiles image