Cause the num of positive labels using center_on is much less than using in_bbox, I found classification scores are much lower when CENTER_POS_RADIOS = 1.5 than CENTER_POS_RADIOS = 3.0, should I set the alpha parameter of focal loss to a smaller value? The default alpha is 0.25, gamma is 2.0.
i think should reduce the value of gamma, because with the increase of CENTER_POS_RADIOS, some background area is included in the GT, which may make focal loss performes not excellent.
Cause the num of positive labels using center_on is much less than using in_bbox, I found classification scores are much lower when CENTER_POS_RADIOS = 1.5 than CENTER_POS_RADIOS = 3.0, should I set the alpha parameter of focal loss to a smaller value? The default alpha is 0.25, gamma is 2.0.