All Projects → wuzhihao7788 → Yolodet Pytorch

wuzhihao7788 / Yolodet Pytorch

reproduce the YOLO series of papers in pytorch, including YOLOv4, PP-YOLO, YOLOv5,YOLOv3, etc.

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简体中文 | English

YOLODet-PyTorch

YOLODet-PyTorch是端到端基于pytorch框架复现yolo最新算法的目标检测开发套件,旨在帮助开发者更快更好地完成检测模型的训练、精度速度优化到部署全流程。YOLODet-PyTorch以模块化的设计实现了多种主流YOLO目标检测算法,并且提供了丰富的数据增强、网络组件、损失函数等模块。

目前检测库下模型均要求使用PyTorch 1.5及以上版本或适当的develop版本。

内容

简介

特性:

  • 模型丰富:

    YOLODet提供了丰富的模型,涵盖最新YOLO检测算法的复现,包含YOLOv5、YOLOv4、PP-YOLO、YOLOv3等YOLO系列目标检测算法。

  • 高灵活度:

    YOLODet通过模块化设计来解耦各个组件,基于配置文件可以轻松地搭建各种检测模型。

支持的模型:

更多的Backone:

  • DarkNet
  • CSPDarkNet
  • ResNet
  • YOLOv5Darknet

数据增强方法:

  • Mosaic
  • MixUp
  • Resize
  • LetterBox
  • RandomCrop
  • RandomFlip
  • RandomHSV
  • RandomBlur
  • RandomNoise
  • RandomAffine
  • RandomTranslation
  • Normalize
  • ImageToTensor
  • 相关配置使用说明请参考【这里

损失函数支持:

  • bbox loss (IOU,GIOU,DIOU,CIOU)
  • confidence loss(YOLOv4,YOLOv5,PP-YOLO)
  • IOU_Aware_Loss(PP-YOLO)
  • FocalLoss

训练技巧支持:

  • 指数移动平均
  • 预热
  • 梯度剪切
  • 梯度累计更新
  • 多尺度训练
  • 学习率调整:Fixed,Step,Exp,Poly,Inv,Consine
  • Label Smooth
  • 强烈说明 通过实验对比发现YOLOv5的正负样本划分定义和损失函数定义,使得模型收敛速度较快,远超原yolo系列对正负样本的划分和损失定义。对于如果卡资源不充足,想在短时间内收敛模型,可采用yolov5的正负样本划分和损失函数定义,相关参数为yolo_loss_type=yolov5
  • 额外补充 YOLOv5对于正样本的定义:在不同尺度下只要真框和给定锚框的的比值在4倍以内,该锚框即可负责预测该真值框。并根据gx,gy在grid中心点位置的偏移量会额外新增两个grid坐标来预测。通过这一系列操作,增加了正样本数量,加速模型收敛速度。而YOLO原系列对于真框,在不同尺度下只有在该尺度下IOU交并集最大的锚框负责预测该真框,其他锚框不负责,所以由于较少的正样本量,模型收敛速度较慢。

扩展特性:

  • [x] Group Norm
  • [x] Modulated Deformable Convolution
  • [x] Focus
  • [x] Spatial Pyramid Pooling
  • [x] FPN-PAN
  • [x] coord conv
  • [x] drop block
  • [x] SAM

代码结构说明

yolodet-pytorch
├──cfg              #模型配置文件所在目录(yolov5,yolov4等)
├──tools            #工具包,包含训练代码,测试代码和推断代码入口。
├──yolodet          #YOLO检测框架核心代码库
│  ├──apis          #提供检测框架的训练,测试和推断和模型保存的接口
│  ├──dataset       #包含DateSet,DateLoader和数据增强等通用方法
│  ├──models        #YOLO检测框架的核心组件集结地
│  │  ├──detectors  #所有类型检测器集结地
│  │  ├──backbones  #所有骨干网络集结地
│  │  ├──necks      #所有necks集结地
│  │  ├──heads      #heads集结地
│  │  ├──loss       #所有损失函数集结地
│  │  ├──hooks      #hooks集结地(学习率调整,模型保存,训练日志,权重更新等)
│  │  ├──utils      #所有工具方法集结地

安装说明

安装和数据集准备请参考 INSTALL.md

快速开始

请参阅 GETTING_STARTED.md 了解YOLODet的基本用法。

预训练模型

查看预训练模型请点击【这里

重要说明

由于该检测框架为个人闲暇之余,处于对深度学习的热爱,自己单独编写完成,也由于自己囊中羞涩,没有充足的显卡资源,提供的MSCOCO大型数据集的预训练模型为未完整训练的模型,后面会陆陆续续提供完整版的预训练模型,敬请大家期待。对于小型数据集本人已经测试和验证过,并在实际项目中使用过该框架训练的模型,没有问题,精度和速度都能保证。

鸣谢

如何贡献代码

欢迎你为YOLODet提供代码,也十分感谢你的反馈。本人将不断完善和改进这个基于PyTorch实现的YOLO全系列的目标检测框架,并希望更多志同道合的爱好者和从业者能参与进来,共同维护这个项目。 如有对此感兴趣的同学,可联系我的gmail邮箱:[email protected],期待与你一起完善和进步。

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