I tried to use snms as below, but result is bad (See the attachment)..
refind_idx = cpu_nms.cpu_soft_nms(bboxes.astype(np.float32), nms_thresh).

But regular cpu_nms as below is OK:.
refind_idx = cpu_nms.cpu_nms(bboxes.astype(np.float32), nms_thresh).
Thanks,