run in CPU mode

[ForestWang]

Dear Sir:

when i run the demo code with CPU mode, nothing detected, the output is :

try load weights from: ./weights/model_0509999.pth
INFO 03.21 16:31:38 checkpoint.py:121: Loading checkpoint from ./weights/model_0509999.pth
tensor([ 1, 80, 112, 168])
tensor([[[18815, 16863, 16887, ..., 2773, 2781, 2757],
[18207, 18703, 18231, ..., 9472, 15063, 15039],
[18728, 18720, 18752, ..., 18243, 18227, 18251],
...,
[18648, 11093, 11760, ..., 7292, 7316, 7324],
[ 167, 18815, 18648, ..., 18670, 12431, 9408],
[18815, 18648, 167, ..., 3, 18773, 16743]]])
tensor(112)
tensor(168)
tensor(18816)
b.pred_boxes: []
b.scores: []
b.pred_classes: []