前提：
对于某些边界不明确的小目标，要是目标由比较多的话，标注起来就会非常麻烦。
如何利用已有训练模型，生成框，进行预标注。再通过调节预标注框的方式，提高标注的效率。
1 通过预先训练的模型生成yolo 格式的框
python
image_absolute_path = "yyy_test/img/L206_20240516101319_2_20240516101319_N49_2.jpg"
# Load the YOLOv8 model#
model = YOLO('./runs/detect/train4080/26/last.pt') # 4080
# Open the video file
image = cv.imread(image_absolute_path, 1)
results = model.predict(image_absolute_path, imgsz=640, show=True)
shape = image.shape
# float_rect[0] *= shape[1]
# float_rect[1] *= shape[0]
# float_rect[2] *= shape[1]
# float_rect[3] *= shape[0]
filename = image_absolute_path.replace('jpg', 'txt') # 将path里的json替换成txt,生成txt里相对应的文件路径
w = shape[1]
h = shape[0]
fh = open(filename, 'w', encoding='utf-8')
all_line = ''
results[0].plot()
for result in results:
for r in result.boxes.data.tolist():
x1, y1, x2, y2, score, class_id = r
x1, x2 = x1 / w, x2 / w
y1, y2 = y1 / h, y2 / h
cx = (x1 + x2) / 2
cy = (y1 + y2) / 2
wi = abs(x2 - x1)
hi = abs(y2 - y1)
line = "%s %.4f %.4f %.4f %.4f\n" % (class_id, cx, cy, wi, hi) # 生成txt文件里每行的内容
all_line += line
fh.write(all_line)yolo .txt 格式的框
2 将yolo 格式 转换为labelme 格式
python
import cv2
import os
import json
import shutil
import numpy as np
from pathlib import Path
dic = {0: 'NVshaoxi', 1: "Nqiaoqi", 2: 'Nqiaojie',3: 'N_pianyi',4: "N_yiwu" ,\
5: 'NVshaoxi', 6: "NVqiaoqi", 7: 'NVqiaojie',8: 'NV_pianyi',9: "NV_yiwu"}
def xyxy2labelme(labels, w, h, image_path, save_dir='res/'):
save_dir = str(Path(save_dir)) + '/'
if not os.path.exists(save_dir):
os.makedirs(save_dir)
label_dict = {}
label_dict['version'] = '5.0.1'
label_dict['flags'] = {}
label_dict['imageData'] = None
label_dict['imagePath'] = image_path
label_dict['imageHeight'] = h
label_dict['imageWidth'] = w
label_dict['shapes'] = []
for l in labels:
tmp = {}
tmp['label'] = dic[int(l[0])]
tmp['points'] = [[l[1], l[2]], [l[3], l[4]]]
tmp['group_id'] = None
tmp['shape_type'] = 'rectangle'
tmp['flags'] = {}
label_dict['shapes'].append(tmp)
fn = save_dir + image_path.rsplit('.', 1)[0] + '.json'
with open(fn, 'w') as f:
json.dump(label_dict, f)
def yolo2labelme(yolo_image_dir, yolo_label_dir, save_dir='res/'):
yolo_image_dir = str(Path(yolo_image_dir)) + '/'
yolo_label_dir = str(Path(yolo_label_dir)) + '/'
save_dir = str(Path(save_dir)) + '/'
image_files = os.listdir(yolo_image_dir)
for iimgf, imgf in enumerate(image_files):
print(iimgf + 1, '/', len(image_files), imgf)
fn = imgf.rsplit('.', 1)[0]
shutil.copy(yolo_image_dir + imgf, save_dir + imgf)
image = cv2.imread(yolo_image_dir + imgf)
h, w = image.shape[:2]
if not os.path.exists(yolo_label_dir + fn + '.txt'):
continue
labels = np.loadtxt(yolo_label_dir + fn + '.txt').reshape(-1, 5)
if len(labels) < 1:
continue
labels[:, 1::2] = w * labels[:, 1::2]
labels[:, 2::2] = h * labels[:, 2::2]
labels_xyxy = np.zeros(labels.shape)
labels_xyxy[:, 0] = np.clip(labels[:, 0], 0, 20)
labels_xyxy[:, 1] = np.clip(labels[:, 1] - labels[:, 3] / 2, 0, w)
labels_xyxy[:, 2] = np.clip(labels[:, 2] - labels[:, 4] / 2, 0, h)
labels_xyxy[:, 3] = np.clip(labels[:, 1] + labels[:, 3] / 2, 0, w)
labels_xyxy[:, 4] = np.clip(labels[:, 2] + labels[:, 4] / 2, 0, h)
xyxy2labelme(labels_xyxy, w, h, imgf, save_dir)
print('Completed!')
if __name__ == '__main__':
yolo_image_dir = 'E:/pythonCode/pythonProject1/yyy_test/img/'
yolo_label_dir = 'E:/pythonCode/pythonProject1/yyy_test/txt/'
save_dir ='E:/pythonCode/pythonProject1/res/'
yolo2labelme(yolo_image_dir, yolo_label_dir, save_dir)labelme 的 .json格式
3 用labelme 微调标注框
将刚才生成的与图片名称相同的后缀为.json 的文件和图片放在同一个目录下，然后用labelme 打开该dir。
4 再将labelme 格式的数据变为yolo 格式，加入训练
python
import json
import cv2
import numpy as np
import os
def json2yolo(path):
# dic={'N_shaoxi':'0', 'N_qiaoqi':'1', 'N_qiaojie':'2', 'N_pianyi':'3', 'N_yiwu': '4', \
# 'NV_shaoxi': '5', 'NV_qiaoqi': '6', 'NV_qiaojie': '7', 'NV_pianyi': '8', 'NV_yiwu': '9',\
# 'R_shaoxi': '10', 'R_qiaoqi': '11', 'R_qiaojie': '12', 'R_pianyi': '13', 'R_yiwu': '14',\
# 'XS_shaoxi': '15', "XS_qiaoqi": '16', 'XS_qiaojie': '17', 'XS_pianyi': '18', 'XS_yiwu': '19',
# '1': '0'}
dic={'N_shaoxi':'0', 'N_qiaoqi':'1', 'N_qiaojie':'2', 'N_pianyi':'3', 'N_yiwu': '4', \
'NV_shaoxi': '5', 'NV_qiaoqi': '6', 'NV_qiaojie': '7', 'NV_pianyi': '8', 'NV_yiwu': '9',\
'R_shaoxi': '10', 'R_qiaoqi': '11', 'R_qiaojie': '12', 'R_pianyi': '13', 'R_yiwu': '14',\
'XS_shaoxi': '15', "XS_qiaoqi": '16', 'XS_qiaojie': '17', 'XS_pianyi': '18', 'XS_yiwu': '19',
'XP_shaoxi': '15', "XP_qiaoqi": '16', 'XP_qiaojie': '17', 'XP_pianyi': '18', 'XP_yiwu': '19'}
#dic = {'N_shaoxi': '0', 'N_shaoxi': '1','N_qiaojie': '2','N_pianyi':'3','N_yiwu:'4'} # 类别字典
if ".json" in path:
data = json.load(open(path,encoding="utf-8"))#读取带有中文的文件
w=data["imageWidth"]#获取jaon文件里图片的宽高
h=data["imageHeight"]
all_line=''
for i in data["shapes"]:
#归一化坐标点。并得到cx,cy,w,h
[[x1,y1],[x2,y2]]=i['points']
x1,x2=x1/w,x2/w
y1,y2=y1/h,y2/h
cx=(x1+x2)/2
cy=(y1+y2)/2
wi=abs(x2-x1)
hi=abs(y2-y1)
#将数据组装成yolo格式
line="%s %.4f %.4f %.4f %.4f\n"%(dic[i['label']],cx,cy,wi,hi)#生成txt文件里每行的内容
all_line+=line
# print(all_line)
filename = path.replace('json','txt')#将path里的json替换成txt,生成txt里相对应的文件路径
fh = open(filename,'w',encoding='utf-8')
fh.write(all_line)
fh.close()
else:
filename = path.replace('.jpg', '.txt') # 将path里的json替换成txt,生成txt里相对应的文件路径
fh = open(filename, 'w', encoding='utf-8')
fh.close()
path= "E:/919XP/" # /
path_list_sub = os.listdir(path)
print("path_list_sub", path_list_sub)
for path_sub in path_list_sub:
json_path_list =os.listdir(path+path_sub)
path_list2=[x for x in json_path_list]#获取所有json文件的路径
# path_list2 = [x for x in json_path_list if ".json" in x] # 获取所有json文件的路径
print("len of path_list2 ",path_sub,len(path_list2))
for p in path_list2:
absolute_path= (path+path_sub+'/'+p)
print("abs path",absolute_path)
json2yolo(path+path_sub+'/'+p)