yolov8改进-添加Wise-IoU，yolov8损失改进
1.在ultralytics/utils/metrics.py文件里找到 bbox_iou函数
注释整个函数
2.将注释的函数后面，去添加以下代码（替换上面注释的函数）
class WIoU_Scale:''' monotonous: {None: origin v1True: monotonic FM v2False: non-monotonic FM v3}momentum: The momentum of running mean'''iou_mean = 1.monotonous = False_momentum = 1 - 0.5 ** (1 / 7000)_is_train = Truedef __init__(self, iou):self.iou = iouself._update(self)@classmethoddef _update(cls, self):if cls._is_train: cls.iou_mean = (1 - cls._momentum) * cls.iou_mean + \cls._momentum * self.iou.detach().mean().item()@classmethoddef _scaled_loss(cls, self, gamma=1.9, delta=3):if isinstance(self.monotonous, bool):if self.monotonous:return (self.iou.detach() / self.iou_mean).sqrt()else:beta = self.iou.detach() / self.iou_meanalpha = delta * torch.pow(gamma, beta - delta)return beta / alphareturn 1def bbox_iou(box1, box2, xywh=True, GIoU=False, DIoU=False, CIoU=False, SIoU=False, EIoU=False, WIoU=False, Focal=False,alpha=1, gamma=0.5, scale=False, eps=1e-7):# Returns Intersection over Union (IoU) of box1(1,4) to box2(n,4)# Get the coordinates of bounding boxesif xywh: # transform from xywh to xyxy(x1, y1, w1, h1), (x2, y2, w2, h2) = box1.chunk(4, -1), box2.chunk(4, -1)w1_, h1_, w2_, h2_ = w1 / 2, h1 / 2, w2 / 2, h2 / 2b1_x1, b1_x2, b1_y1, b1_y2 = x1 - w1_, x1 + w1_, y1 - h1_, y1 + h1_b2_x1, b2_x2, b2_y1, b2_y2 = x2 - w2_, x2 + w2_, y2 - h2_, y2 + h2_else: # x1, y1, x2, y2 = box1b1_x1, b1_y1, b1_x2, b1_y2 = box1.chunk(4, -1)b2_x1, b2_y1, b2_x2, b2_y2 = box2.chunk(4, -1)w1, h1 = b1_x2 - b1_x1, (b1_y2 - b1_y1).clamp(eps)w2, h2 = b2_x2 - b2_x1, (b2_y2 - b2_y1).clamp(eps)# Intersection areainter = (b1_x2.minimum(b2_x2) - b1_x1.maximum(b2_x1)).clamp(0) * \(b1_y2.minimum(b2_y2) - b1_y1.maximum(b2_y1)).clamp(0)# Union Areaunion = w1 * h1 + w2 * h2 - inter + epsif scale:self = WIoU_Scale(1 - (inter / union))# IoU# iou = inter / union # ori iouiou = torch.pow(inter / (union + eps), alpha) # alpha iouif CIoU or DIoU or GIoU or EIoU or SIoU or WIoU:cw = b1_x2.maximum(b2_x2) - b1_x1.minimum(b2_x1) # convex (smallest enclosing box) widthch = b1_y2.maximum(b2_y2) - b1_y1.minimum(b2_y1) # convex heightif CIoU or DIoU or EIoU or SIoU or WIoU: # Distance or Complete IoU https://arxiv.org/abs/1911.08287v1c2 = (cw ** 2 + ch ** 2) ** alpha + eps # convex diagonal squaredrho2 = (((b2_x1 + b2_x2 - b1_x1 - b1_x2) ** 2 + (b2_y1 + b2_y2 - b1_y1 - b1_y2) ** 2) / 4) ** alpha # center dist ** 2if CIoU: # https://github.com/Zzh-tju/DIoU-SSD-pytorch/blob/master/utils/box/box_utils.py#L47v = (4 / math.pi ** 2) * (torch.atan(w2 / h2) - torch.atan(w1 / h1)).pow(2)with torch.no_grad():alpha_ciou = v / (v - iou + (1 + eps))if Focal:return iou - (rho2 / c2 + torch.pow(v * alpha_ciou + eps, alpha)), torch.pow(inter / (union + eps),gamma) # Focal_CIoUelse:return iou - (rho2 / c2 + torch.pow(v * alpha_ciou + eps, alpha)) # CIoUelif EIoU:rho_w2 = ((b2_x2 - b2_x1) - (b1_x2 - b1_x1)) ** 2rho_h2 = ((b2_y2 - b2_y1) - (b1_y2 - b1_y1)) ** 2cw2 = torch.pow(cw ** 2 + eps, alpha)ch2 = torch.pow(ch ** 2 + eps, alpha)if Focal:return iou - (rho2 / c2 + rho_w2 / cw2 + rho_h2 / ch2), torch.pow(inter / (union + eps),gamma) # Focal_EIouelse:return iou - (rho2 / c2 + rho_w2 / cw2 + rho_h2 / ch2) # EIouelif SIoU:# SIoU Loss https://arxiv.org/pdf/2205.12740.pdfs_cw = (b2_x1 + b2_x2 - b1_x1 - b1_x2) * 0.5 + epss_ch = (b2_y1 + b2_y2 - b1_y1 - b1_y2) * 0.5 + epssigma = torch.pow(s_cw ** 2 + s_ch ** 2, 0.5)sin_alpha_1 = torch.abs(s_cw) / sigmasin_alpha_2 = torch.abs(s_ch) / sigmathreshold = pow(2, 0.5) / 2sin_alpha = torch.where(sin_alpha_1 > threshold, sin_alpha_2, sin_alpha_1)angle_cost = torch.cos(torch.arcsin(sin_alpha) * 2 - math.pi / 2)rho_x = (s_cw / cw) ** 2rho_y = (s_ch / ch) ** 2gamma = angle_cost - 2distance_cost = 2 - torch.exp(gamma * rho_x) - torch.exp(gamma * rho_y)omiga_w = torch.abs(w1 - w2) / torch.max(w1, w2)omiga_h = torch.abs(h1 - h2) / torch.max(h1, h2)shape_cost = torch.pow(1 - torch.exp(-1 * omiga_w), 4) + torch.pow(1 - torch.exp(-1 * omiga_h), 4)if Focal:return iou - torch.pow(0.5 * (distance_cost + shape_cost) + eps, alpha), torch.pow(inter / (union + eps), gamma) # Focal_SIouelse:return iou - torch.pow(0.5 * (distance_cost + shape_cost) + eps, alpha) # SIouelif WIoU:if Focal:raise RuntimeError("WIoU do not support Focal.")elif scale:return getattr(WIoU_Scale, '_scaled_loss')(self), (1 - iou) * torch.exp((rho2 / c2)), iou # WIoU https://arxiv.org/abs/2301.10051else:return iou, torch.exp((rho2 / c2)) # WIoU v1if Focal:return iou - rho2 / c2, torch.pow(inter / (union + eps), gamma) # Focal_DIoUelse:return iou - rho2 / c2 # DIoUc_area = cw * ch + eps # convex areaif Focal:return iou - torch.pow((c_area - union) / c_area + eps, alpha), torch.pow(inter / (union + eps),gamma) # Focal_GIoU https://arxiv.org/pdf/1902.09630.pdfelse:return iou - torch.pow((c_area - union) / c_area + eps, alpha) # GIoU https://arxiv.org/pdf/1902.09630.pdfif Focal:return iou, torch.pow(inter / (union + eps), gamma) # Focal_IoUelse:return iou # IoU### 源码修改（还原则删除）- loss2 - end
参考链接：
原文链接：https: // blog.csdn.net / darkredrock / article / details / 130292080
原文链接：https: // blog.csdn.net / weixin_45303602 / article / details / 133748724
3.ultralytics/utils/loss.py文件里，找到BboxLoss类中的forward
找到下面两行代码
iou = bbox_iou(pred_bboxes[fg_mask], target_bboxes[fg_mask], xywh=False, CIoU=True)
loss_iou = ((1.0 - iou) * weight).sum() / target_scores_sum
替换为以下代码：
# todo 源码修改（还原则删除）- loss6_# # WIoUiou = bbox_iou_for_nms(pred_bboxes[fg_mask], target_bboxes[fg_mask], xywh=False, WIoU=True, scale=True)if type(iou) is tuple:if len(iou) == 2:loss_iou = ((1.0 - iou[0]) * iou[1].detach() * weight).sum() / target_scores_sumelse:loss_iou = (iou[0] * iou[1] * weight).sum() / target_scores_sumelse:loss_iou = ((1.0 - iou) * weight).sum() / target_scores_sum# 源码修改（还原则删除）- loss6 - end
4.还是loss文件中，添加以下bbox_iou_for_nms代码
# todo 源码修改（还原则删除）- loss7(2)_
def bbox_iou_for_nms(box1, box2, xywh=True, GIoU=False, DIoU=False, CIoU=False, SIoU=False, EIoU=False, WIoU=False,Focal=False, alpha=1, gamma=0.5, scale=False, eps=1e-7):# Returns Intersection over Union (IoU) of box1(1,4) to box2(n,4)# Get the coordinates of bounding boxesif xywh: # transform from xywh to xyxy(x1, y1, w1, h1), (x2, y2, w2, h2) = box1.chunk(4, -1), box2.chunk(4, -1)w1_, h1_, w2_, h2_ = w1 / 2, h1 / 2, w2 / 2, h2 / 2b1_x1, b1_x2, b1_y1, b1_y2 = x1 - w1_, x1 + w1_, y1 - h1_, y1 + h1_b2_x1, b2_x2, b2_y1, b2_y2 = x2 - w2_, x2 + w2_, y2 - h2_, y2 + h2_else: # x1, y1, x2, y2 = box1b1_x1, b1_y1, b1_x2, b1_y2 = box1.chunk(4, -1)b2_x1, b2_y1, b2_x2, b2_y2 = box2.chunk(4, -1)w1, h1 = b1_x2 - b1_x1, (b1_y2 - b1_y1).clamp(eps)w2, h2 = b2_x2 - b2_x1, (b2_y2 - b2_y1).clamp(eps)# Intersection areainter = (b1_x2.minimum(b2_x2) - b1_x1.maximum(b2_x1)).clamp(0) * \(b1_y2.minimum(b2_y2) - b1_y1.maximum(b2_y1)).clamp(0)# Union Areaunion = w1 * h1 + w2 * h2 - inter + epsif scale:self = WIoU_Scale(1 - (inter / union))# IoU# iou = inter / union # ori iouiou = torch.pow(inter / (union + eps), alpha) # alpha iouif CIoU or DIoU or GIoU or EIoU or SIoU or WIoU:cw = b1_x2.maximum(b2_x2) - b1_x1.minimum(b2_x1) # convex (smallest enclosing box) widthch = b1_y2.maximum(b2_y2) - b1_y1.minimum(b2_y1) # convex heightif CIoU or DIoU or EIoU or SIoU or WIoU: # Distance or Complete IoU https://arxiv.org/abs/1911.08287v1c2 = (cw ** 2 + ch ** 2) ** alpha + eps # convex diagonal squaredrho2 = (((b2_x1 + b2_x2 - b1_x1 - b1_x2) ** 2 + (b2_y1 + b2_y2 - b1_y1 - b1_y2) ** 2) / 4) ** alpha # center dist ** 2if CIoU: # https://github.com/Zzh-tju/DIoU-SSD-pytorch/blob/master/utils/box/box_utils.py#L47v = (4 / math.pi ** 2) * (torch.atan(w2 / h2) - torch.atan(w1 / h1)).pow(2)with torch.no_grad():alpha_ciou = v / (v - iou + (1 + eps))if Focal:return iou - (rho2 / c2 + torch.pow(v * alpha_ciou + eps, alpha)), torch.pow(inter / (union + eps),gamma) # Focal_CIoUelse:return iou - (rho2 / c2 + torch.pow(v * alpha_ciou + eps, alpha)) # CIoUelif EIoU:rho_w2 = ((b2_x2 - b2_x1) - (b1_x2 - b1_x1)) ** 2rho_h2 = ((b2_y2 - b2_y1) - (b1_y2 - b1_y1)) ** 2cw2 = torch.pow(cw ** 2 + eps, alpha)ch2 = torch.pow(ch ** 2 + eps, alpha)if Focal:return iou - (rho2 / c2 + rho_w2 / cw2 + rho_h2 / ch2), torch.pow(inter / (union + eps),gamma) # Focal_EIouelse:return iou - (rho2 / c2 + rho_w2 / cw2 + rho_h2 / ch2) # EIouelif SIoU:# SIoU Loss https://arxiv.org/pdf/2205.12740.pdfs_cw = (b2_x1 + b2_x2 - b1_x1 - b1_x2) * 0.5 + epss_ch = (b2_y1 + b2_y2 - b1_y1 - b1_y2) * 0.5 + epssigma = torch.pow(s_cw ** 2 + s_ch ** 2, 0.5)sin_alpha_1 = torch.abs(s_cw) / sigmasin_alpha_2 = torch.abs(s_ch) / sigmathreshold = pow(2, 0.5) / 2sin_alpha = torch.where(sin_alpha_1 > threshold, sin_alpha_2, sin_alpha_1)angle_cost = torch.cos(torch.arcsin(sin_alpha) * 2 - math.pi / 2)rho_x = (s_cw / cw) ** 2rho_y = (s_ch / ch) ** 2gamma = angle_cost - 2distance_cost = 2 - torch.exp(gamma * rho_x) - torch.exp(gamma * rho_y)omiga_w = torch.abs(w1 - w2) / torch.max(w1, w2)omiga_h = torch.abs(h1 - h2) / torch.max(h1, h2)shape_cost = torch.pow(1 - torch.exp(-1 * omiga_w), 4) + torch.pow(1 - torch.exp(-1 * omiga_h), 4)if Focal:return iou - torch.pow(0.5 * (distance_cost + shape_cost) + eps, alpha), torch.pow(inter / (union + eps), gamma) # Focal_SIouelse:return iou - torch.pow(0.5 * (distance_cost + shape_cost) + eps, alpha) # SIouelif WIoU:if Focal:raise RuntimeError("WIoU do not support Focal.")elif scale:return getattr(WIoU_Scale, '_scaled_loss')(self), (1 - iou) * torch.exp((rho2 / c2)), iou # WIoU https://arxiv.org/abs/2301.10051else:return iou, torch.exp((rho2 / c2)) # WIoU v1if Focal:return iou - rho2 / c2, torch.pow(inter / (union + eps), gamma) # Focal_DIoUelse:return iou - rho2 / c2 # DIoUc_area = cw * ch + eps # convex areaif Focal:return iou - torch.pow((c_area - union) / c_area + eps, alpha), torch.pow(inter / (union + eps),gamma) # Focal_GIoU https://arxiv.org/pdf/1902.09630.pdfelse:return iou - torch.pow((c_area - union) / c_area + eps, alpha) # GIoU https://arxiv.org/pdf/1902.09630.pdfif Focal:return iou, torch.pow(inter / (union + eps), gamma) # Focal_IoUelse:return iou # IoU# def soft_nms(bboxes, scores, iou_thresh=0.5, sigma=0.5, score_threshold=0.25):
# order = torch.arange(0, scores.size(0)).to(bboxes.device)
# keep = []
#
# while order.numel() > 1:
# if order.numel() == 1:
# keep.append(order[0])
# break
# else:
# i = order[0]
# keep.append(i)
# # todo 源码修改（还原则取消注释）- loss10_
# iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]]).squeeze()
# # todo 源码修改（还原则删除）- loss11_
# # iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]],WIoU=True).squeeze()
# # iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]],WIoU=True)
#
# idx = (iou > iou_thresh).nonzero().squeeze()
# if idx.numel() > 0:
# iou = iou[idx]
# newScores = torch.exp(-torch.pow(iou, 2) / sigma)
# scores[order[idx + 1]] *= newScores
#
# newOrder = (scores[order[1:]] > score_threshold).nonzero().squeeze()
# if newOrder.numel() == 0:
# break
# else:
# maxScoreIndex = torch.argmax(scores[order[newOrder + 1]])
# if maxScoreIndex != 0:
# newOrder[[0, maxScoreIndex],] = newOrder[[maxScoreIndex, 0],]
# order = order[newOrder + 1]
#
# return torch.LongTensor(keep)
# 源码修改（还原则删除）- loss7(2) - end原参考链接是在metrics.py下添加上述bbox_iou_for_nms代码，可参考，不过我这边报错，已注释
# todo 源码修改（还原则删除）- loss7_
# def bbox_iou_for_nms(box1, box2, xywh=True, GIoU=False, DIoU=False, CIoU=False, SIoU=False, EIoU=False, WIoU=False,
# Focal=False, alpha=1, gamma=0.5, scale=False, eps=1e-7):
# # Returns Intersection over Union (IoU) of box1(1,4) to box2(n,4)
#
# # Get the coordinates of bounding boxes
# if xywh: # transform from xywh to xyxy
# (x1, y1, w1, h1), (x2, y2, w2, h2) = box1.chunk(4, -1), box2.chunk(4, -1)
# w1_, h1_, w2_, h2_ = w1 / 2, h1 / 2, w2 / 2, h2 / 2
# b1_x1, b1_x2, b1_y1, b1_y2 = x1 - w1_, x1 + w1_, y1 - h1_, y1 + h1_
# b2_x1, b2_x2, b2_y1, b2_y2 = x2 - w2_, x2 + w2_, y2 - h2_, y2 + h2_
# else: # x1, y1, x2, y2 = box1
# b1_x1, b1_y1, b1_x2, b1_y2 = box1.chunk(4, -1)
# b2_x1, b2_y1, b2_x2, b2_y2 = box2.chunk(4, -1)
# w1, h1 = b1_x2 - b1_x1, (b1_y2 - b1_y1).clamp(eps)
# w2, h2 = b2_x2 - b2_x1, (b2_y2 - b2_y1).clamp(eps)
#
# # Intersection area
# inter = (b1_x2.minimum(b2_x2) - b1_x1.maximum(b2_x1)).clamp(0) * \
# (b1_y2.minimum(b2_y2) - b1_y1.maximum(b2_y1)).clamp(0)
#
# # Union Area
# union = w1 * h1 + w2 * h2 - inter + eps
# if scale:
# self = WIoU_Scale(1 - (inter / union))
#
# # IoU
# # iou = inter / union # ori iou
# iou = torch.pow(inter / (union + eps), alpha) # alpha iou
# if CIoU or DIoU or GIoU or EIoU or SIoU or WIoU:
# cw = b1_x2.maximum(b2_x2) - b1_x1.minimum(b2_x1) # convex (smallest enclosing box) width
# ch = b1_y2.maximum(b2_y2) - b1_y1.minimum(b2_y1) # convex height
# if CIoU or DIoU or EIoU or SIoU or WIoU: # Distance or Complete IoU https://arxiv.org/abs/1911.08287v1
# c2 = (cw ** 2 + ch ** 2) ** alpha + eps # convex diagonal squared
# rho2 = (((b2_x1 + b2_x2 - b1_x1 - b1_x2) ** 2 + (
# b2_y1 + b2_y2 - b1_y1 - b1_y2) ** 2) / 4) ** alpha # center dist ** 2
# if CIoU: # https://github.com/Zzh-tju/DIoU-SSD-pytorch/blob/master/utils/box/box_utils.py#L47
# v = (4 / math.pi ** 2) * (torch.atan(w2 / h2) - torch.atan(w1 / h1)).pow(2)
# with torch.no_grad():
# alpha_ciou = v / (v - iou + (1 + eps))
# if Focal:
# return iou - (rho2 / c2 + torch.pow(v * alpha_ciou + eps, alpha)), torch.pow(inter / (union + eps),
# gamma) # Focal_CIoU
# else:
# return iou - (rho2 / c2 + torch.pow(v * alpha_ciou + eps, alpha)) # CIoU
# elif EIoU:
# rho_w2 = ((b2_x2 - b2_x1) - (b1_x2 - b1_x1)) ** 2
# rho_h2 = ((b2_y2 - b2_y1) - (b1_y2 - b1_y1)) ** 2
# cw2 = torch.pow(cw ** 2 + eps, alpha)
# ch2 = torch.pow(ch ** 2 + eps, alpha)
# if Focal:
# return iou - (rho2 / c2 + rho_w2 / cw2 + rho_h2 / ch2), torch.pow(inter / (union + eps),
# gamma) # Focal_EIou
# else:
# return iou - (rho2 / c2 + rho_w2 / cw2 + rho_h2 / ch2) # EIou
# elif SIoU:
# # SIoU Loss https://arxiv.org/pdf/2205.12740.pdf
# s_cw = (b2_x1 + b2_x2 - b1_x1 - b1_x2) * 0.5 + eps
# s_ch = (b2_y1 + b2_y2 - b1_y1 - b1_y2) * 0.5 + eps
# sigma = torch.pow(s_cw ** 2 + s_ch ** 2, 0.5)
# sin_alpha_1 = torch.abs(s_cw) / sigma
# sin_alpha_2 = torch.abs(s_ch) / sigma
# threshold = pow(2, 0.5) / 2
# sin_alpha = torch.where(sin_alpha_1 > threshold, sin_alpha_2, sin_alpha_1)
# angle_cost = torch.cos(torch.arcsin(sin_alpha) * 2 - math.pi / 2)
# rho_x = (s_cw / cw) ** 2
# rho_y = (s_ch / ch) ** 2
# gamma = angle_cost - 2
# distance_cost = 2 - torch.exp(gamma * rho_x) - torch.exp(gamma * rho_y)
# omiga_w = torch.abs(w1 - w2) / torch.max(w1, w2)
# omiga_h = torch.abs(h1 - h2) / torch.max(h1, h2)
# shape_cost = torch.pow(1 - torch.exp(-1 * omiga_w), 4) + torch.pow(1 - torch.exp(-1 * omiga_h), 4)
# if Focal:
# return iou - torch.pow(0.5 * (distance_cost + shape_cost) + eps, alpha), torch.pow(
# inter / (union + eps), gamma) # Focal_SIou
# else:
# return iou - torch.pow(0.5 * (distance_cost + shape_cost) + eps, alpha) # SIou
# elif WIoU:
# if Focal:
# raise RuntimeError("WIoU do not support Focal.")
# elif scale:
# return getattr(WIoU_Scale, '_scaled_loss')(self), (1 - iou) * torch.exp(
# (rho2 / c2)), iou # WIoU https://arxiv.org/abs/2301.10051
# else:
# return iou, torch.exp((rho2 / c2)) # WIoU v1
# if Focal:
# return iou - rho2 / c2, torch.pow(inter / (union + eps), gamma) # Focal_DIoU
# else:
# return iou - rho2 / c2 # DIoU
# c_area = cw * ch + eps # convex area
# if Focal:
# return iou - torch.pow((c_area - union) / c_area + eps, alpha), torch.pow(inter / (union + eps),
# gamma) # Focal_GIoU https://arxiv.org/pdf/1902.09630.pdf
# else:
# return iou - torch.pow((c_area - union) / c_area + eps, alpha) # GIoU https://arxiv.org/pdf/1902.09630.pdf
# if Focal:
# return iou, torch.pow(inter / (union + eps), gamma) # Focal_IoU
# else:
# return iou # IoU
#
#
# def soft_nms(bboxes, scores, iou_thresh=0.5, sigma=0.5, score_threshold=0.25):
# order = torch.arange(0, scores.size(0)).to(bboxes.device)
# keep = []
#
# while order.numel() > 1:
# if order.numel() == 1:
# keep.append(order[0])
# break
# else:
# i = order[0]
# keep.append(i)
# # todo 源码修改（还原则取消注释）- loss10_
# # iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]]).squeeze()
# # todo 源码修改（还原则删除）- loss11_
# # iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]],WIoU=True).squeeze()
# """
# # 如果，iou等于下面这个-1
# iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]],WIoU=True)
# print(f"--------为解决bug，打印iou--------:{iou}")
# print(f"--------为解决bug，打印iou的类型--------:{type(iou)}") #<class 'tuple'>
# print(f"--------为解决bug，打印iou[0]的形状--------:{iou[0].shape}") # torch.Size([503, 1]) # torch.Size([6693, 1]) # torch.Size([4298, 1])
# print(f"--------为解决bug，打印iou[1]的形状--------:{iou[1].shape}") # torch.Size([503, 1]) # torch.Size([6693, 1]) # torch.Size([4298, 1])
# print(f"--------为解决bug，打印iou的len--------:{len(iou)}") # 2
# # 那么，iou是元组类型，元组里装了两个tensor,每个tensor的shape [x,1] # 即 (tensor(x,1),tensor(x,1))
# """
# """
# # 如果，iou等于下面这个-2
# iou = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]],WIoU=True)[0]
# print(f"--------为解决bug，打印iou--------:{iou}")
# print(f"--------为解决bug，打印iou的类型--------:{type(iou)}") # <class 'torch.Tensor'>
# print(f"--------为解决bug，打印iou[0]的形状--------:{iou[0].shape}") # torch.Size([1])
# print(f"--------为解决bug，打印iou[1]的形状--------:{iou[1].shape}") # torch.Size([1])
# print(f"--------为解决bug，打印iou的len--------:{len(iou)}") # 29
# # scores[order[idx + 1]] *= newScores --报错--> # RuntimeError: The size of tensor a (16) must match the size of tensor b (2) at non-singleton dimension 1
# """
#
# """
# # 如果，iou等于下面这个-3
# iou_temp = bbox_iou_for_nms(bboxes[i], bboxes[order[1:]], WIoU=True)
# iou = (iou_temp[0].squeeze(),iou_temp[1].squeeze())
# print(f"--------为解决bug，打印iou--------:{iou}")
# print(f"--------为解决bug，打印iou的类型--------:{type(iou)}")
# print(f"--------为解决bug，打印iou[0]的形状--------:{iou[0].shape}")
# print(f"--------为解决bug，打印iou[1]的形状--------:{iou[1].shape}")
# print(f"--------为解决bug，打印iou的len--------:{len(iou)}")
# """
# pass
# idx = (iou > iou_thresh).nonzero().squeeze()
# if idx.numel() > 0:
# iou = iou[idx]
# newScores = torch.exp(-torch.pow(iou, 2) / sigma)
# scores[order[idx + 1]] *= newScores
#
# newOrder = (scores[order[1:]] > score_threshold).nonzero().squeeze()
# if newOrder.numel() == 0:
# break
# else:
# maxScoreIndex = torch.argmax(scores[order[newOrder + 1]])
# if maxScoreIndex != 0:
# newOrder[[0, maxScoreIndex],] = newOrder[[maxScoreIndex, 0],]
# order = order[newOrder + 1]
#
# return torch.LongTensor(keep)
# 源码修改（还原则删除）- loss7 - end