The meaning of ROI_SCALE_FACTORS in cfgs

[LeCongThuong]

Thanks for your great work!
I have a question and may you answer me!
I do not get the meaning of ROI_SCALE_FACTORS? I read your code know that this parameter is used to scale the differences between (target_bboxes and anchors)
Why do you have to scale the differences? Could you give me some references?

[henanwg]

我认为是由于：roi pooling那一步，roi坐标归一化的过程中，除以的是原始图像的尺寸，而不是当前roi所在的金字塔特征的尺寸