label about roi_w_scale

[muye5]

I think it's a little strange about the way of roi_w_scale settle (same with roi_h_scale): roi[1] / anchor[1].
Is the roi[1] the ratio of bbox width with original image width or just the raw pixel width?
The grid_w or grid_h is not considered here ?
P.S. Could you share more details about tranning data or skills, I take a try on VOC，but not work very well. Hope more info, Thanks.