🚀🚀🚀手把手教程：教会你如何使用自己的数据集开展分割任务
🚀🚀🚀YOLOv8-seg创新专栏：
学姐带你学习YOLOv8，从入门到创新，轻轻松松搞定科研；
1）手把手教你如何训练YOLOv8-seg；
2）模型创新，提升分割性能；
3）独家自研模块助力分割；
1.数据集介绍
番薯破损分割任务，自己手动标注，数据集大小304张
1.数据集标注
使用labelme进行数据集标注，首先进行labelme安装
pip install labelme
2.数据集格式转换
json to txt以及 划分为train、val、test，适配yolov8-seg
2.1 json2txt.py
# -*- coding: utf-8 -*-
import json
import os
import argparse
from tqdm import tqdm
def convert_label_json(json_dir, save_dir, classes):
json_paths = os.listdir(json_dir)
classes = classes.split(',')
for json_path in tqdm(json_paths):
# for json_path in json_paths:
path = os.path.join(json_dir, json_path)
with open(path, 'r') as load_f:
json_dict = json.load(load_f)
h, w = json_dict['imageHeight'], json_dict['imageWidth']
# save txt path
txt_path = os.path.join(save_dir, json_path.replace('json', 'txt'))
txt_file = open(txt_path, 'w')
for shape_dict in json_dict['shapes']:
label = shape_dict['label']
label_index = classes.index(label)
points = shape_dict['points']
points_nor_list = []
for point in points:
points_nor_list.append(point[0] / w)
points_nor_list.append(point[1] / h)
points_nor_list = list(map(lambda x: str(x), points_nor_list))
points_nor_str = ' '.join(points_nor_list)
label_str = str(label_index) + ' ' + points_nor_str + '\n'
txt_file.writelines(label_str)
if __name__ == "__main__":
"""
python json2txt_nomalize.py --json-dir my_datasets/color_rings/jsons --save-dir my_datasets/color_rings/txts --classes "cat,dogs"
"""
parser = argparse.ArgumentParser(description='json convert to txt params')
parser.add_argument('--json-dir', type=str,default='F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/json', help='json path dir')
parser.add_argument('--save-dir', type=str,default='F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/txt' ,help='txt save dir')
parser.add_argument('--classes', type=str, default='skinning',help='classes')
args = parser.parse_args()
json_dir = args.json_dir
save_dir = args.save_dir
classes = args.classes
convert_label_json(json_dir, save_dir, classes)2.2 划分为train、val、test
# 将图片和标注数据按比例切分为 训练集和测试集
import shutil
import random
import os
import argparse
# 检查文件夹是否存在
def mkdir(path):
if not os.path.exists(path):
os.makedirs(path)
def main(image_dir, txt_dir, save_dir):
# 创建文件夹
mkdir(save_dir)
images_dir = os.path.join(save_dir, 'images')
labels_dir = os.path.join(save_dir, 'labels')
img_train_path = os.path.join(images_dir, 'train')
img_test_path = os.path.join(images_dir, 'test')
img_val_path = os.path.join(images_dir, 'val')
label_train_path = os.path.join(labels_dir, 'train')
label_test_path = os.path.join(labels_dir, 'test')
label_val_path = os.path.join(labels_dir, 'val')
mkdir(images_dir);
mkdir(labels_dir);
mkdir(img_train_path);
mkdir(img_test_path);
mkdir(img_val_path);
mkdir(label_train_path);
mkdir(label_test_path);
mkdir(label_val_path);
# 数据集划分比例，训练集75%，验证集15%，测试集15%，按需修改
train_percent = 0.85
val_percent = 0.15
test_percent = 0
total_txt = os.listdir(txt_dir)
num_txt = len(total_txt)
list_all_txt = range(num_txt) # 范围 range(0, num)
num_train = int(num_txt * train_percent)
num_val = int(num_txt * val_percent)
num_test = num_txt - num_train - num_val
train = random.sample(list_all_txt, num_train)
# 在全部数据集中取出train
val_test = [i for i in list_all_txt if not i in train]
# 再从val_test取出num_val个元素，val_test剩下的元素就是test
val = random.sample(val_test, num_val)
print("训练集数目：{}, 验证集数目：{},测试集数目：{}".format(len(train), len(val), len(val_test) - len(val)))
for i in list_all_txt:
name = total_txt[i][:-4]
srcImage = os.path.join(image_dir, name + '.jpg')
srcLabel = os.path.join(txt_dir, name + '.txt')
if i in train:
dst_train_Image = os.path.join(img_train_path, name + '.jpg')
dst_train_Label = os.path.join(label_train_path, name + '.txt')
shutil.copyfile(srcImage, dst_train_Image)
shutil.copyfile(srcLabel, dst_train_Label)
elif i in val:
dst_val_Image = os.path.join(img_val_path, name + '.jpg')
dst_val_Label = os.path.join(label_val_path, name + '.txt')
shutil.copyfile(srcImage, dst_val_Image)
shutil.copyfile(srcLabel, dst_val_Label)
else:
dst_test_Image = os.path.join(img_test_path, name + '.jpg')
dst_test_Label = os.path.join(label_test_path, name + '.txt')
shutil.copyfile(srcImage, dst_test_Image)
shutil.copyfile(srcLabel, dst_test_Label)
if __name__ == '__main__':
"""
python split_datasets.py --image-dir my_datasets/color_rings/imgs --txt-dir my_datasets/color_rings/txts --save-dir my_datasets/color_rings/train_data
"""
parser = argparse.ArgumentParser(description='split datasets to train,val,test params')
parser.add_argument('--image-dir', type=str,default='F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/images', help='image path dir')
parser.add_argument('--txt-dir', type=str,default='F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/txt' , help='txt path dir')
parser.add_argument('--save-dir', default='F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/split', type=str, help='save dir')
args = parser.parse_args()
image_dir = args.image_dir
txt_dir = args.txt_dir
save_dir = args.save_dir
main(image_dir, txt_dir, save_dir)3.如何训练yolov8-seg
3.1 skinning.yaml配置
# Train/val/test sets as 1) dir: path/to/imgs, 2) file: path/to/imgs.txt, or 3) list: [path/to/imgs1, path/to/imgs2, ..]
path: F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/split # dataset root dir
train: F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/split/images/train # train images (relative to 'path') 4 images
val: F:/DL/Pytorch/yolov8/ultralytics-seg/data/skinning/split/images/val # val images (relative to 'path') 4 images
test: # test images (optional)
nc: 1
# Classes
names:
0: skinning
3.2 如何训练
from ultralytics.cfg import entrypoint
arg="yolo segment train model=yolov8-seg0.yaml data=ultralytics/cfg/datasets/skinning.yaml"
entrypoint(arg)3.3 yolov8-seg.yaml
# Ultralytics YOLO 🚀, AGPL-3.0 license
# YOLOv8-seg instance segmentation model. For Usage examples see https://docs.ultralytics.com/tasks/segment
# Parameters
nc: 1 # number of classes
scales: # model compound scaling constants, i.e. 'model=yolov8n-seg.yaml' will call yolov8-seg.yaml with scale 'n'
# [depth, width, max_channels]
n: [0.33, 0.25, 1024]
s: [0.33, 0.50, 1024]
m: [0.67, 0.75, 768]
l: [1.00, 1.00, 512]
x: [1.00, 1.25, 512]
# YOLOv8.0n backbone
backbone:
# [from, repeats, module, args]
- [-1, 1, Conv, [64, 3, 2]] # 0-P1/2
- [-1, 1, Conv, [128, 3, 2]] # 1-P2/4
- [-1, 3, C2f, [128, True]]
- [-1, 1, Conv, [256, 3, 2]] # 3-P3/8
- [-1, 6, C2f, [256, True]]
- [-1, 1, Conv, [512, 3, 2]] # 5-P4/16
- [-1, 6, C2f, [512, True]]
- [-1, 1, Conv, [1024, 3, 2]] # 7-P5/32
- [-1, 3, C2f, [1024, True]]
- [-1, 1, SPPF, [1024, 5]] # 9
# YOLOv8.0n head
head:
- [-1, 1, nn.Upsample, [None, 2, 'nearest']]
- [[-1, 6], 1, Concat, [1]] # cat backbone P4
- [-1, 3, C2f, [512]] # 12
- [-1, 1, nn.Upsample, [None, 2, 'nearest']]
- [[-1, 4], 1, Concat, [1]] # cat backbone P3
- [-1, 3, C2f, [256]] # 15 (P3/8-small)
- [-1, 1, Conv, [256, 3, 2]]
- [[-1, 12], 1, Concat, [1]] # cat head P4
- [-1, 3, C2f, [512]] # 18 (P4/16-medium)
- [-1, 1, Conv, [512, 3, 2]]
- [[-1, 9], 1, Concat, [1]] # cat head P5
- [-1, 3, C2f, [1024]] # 21 (P5/32-large)
- [[15, 18, 21], 1, Segment, [nc, 32, 256]] # Segment(P3, P4, P5)
4.训练结果可视化
Mask map0.5 原始为0.625
MaskF1_curve
MaskP_curve
MaskPR_curve
MaskR_curve
预测结果：文章来源：https://www.toymoban.com/news/detail-743500.html
文章来源地址https://www.toymoban.com/news/detail-743500.html
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