1、labelme標(biāo)注
當(dāng)你安裝好labelme啟動(dòng)后，open dir開始標(biāo)注，選擇Create Rectangle
拖拽畫框，然后選擇類別（沒有就直接輸入會(huì)自動(dòng)新建），標(biāo)注好一幅圖后點(diǎn)擊next image會(huì)彈框提示保存json文件，保存即可。
當(dāng)你將所有圖像標(biāo)注完后，點(diǎn)擊Next Image是沒有反應(yīng)的（因?yàn)闆]有Next圖了），此時(shí)直接x掉labelme軟件即可
如果你將json文件保存在圖像文件夾中，則應(yīng)當(dāng)有以下結(jié)構(gòu)：
- img1.jpg
- img1.json
- img2.jpg
- img2.json
- …
2、轉(zhuǎn)為coco格式
假設(shè)我有一個(gè)mycoco的數(shù)據(jù)集，是符合coco2017數(shù)據(jù)集格式的，那么他的目錄結(jié)構(gòu)應(yīng)該如下，在mycoco文件夾下有4個(gè)文件夾：annotations(存放train、val和test的標(biāo)注信息)、train(存放train集圖片)、val(存放val集圖片)、test(存放test集圖片)
現(xiàn)在我們已經(jīng)用labelme標(biāo)注好的信息，如何轉(zhuǎn)換為上面的coco結(jié)構(gòu)呢？
#!/usr/bin/env python
# coding: utf-8
# Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
import glob
import json
import os
import os.path as osp
import shutil
import xml.etree.ElementTree as ET
import numpy as np
import PIL.ImageDraw
from tqdm import tqdm
import cv2
label_to_num = {}
categories_list = []
labels_list = []
class MyEncoder(json.JSONEncoder):
def default(self, obj):
if isinstance(obj, np.integer):
return int(obj)
elif isinstance(obj, np.floating):
return float(obj)
elif isinstance(obj, np.ndarray):
return obj.tolist()
else:
return super(MyEncoder, self).default(obj)
def images_labelme(data, num):
image = {}
image['height'] = data['imageHeight']
image['width'] = data['imageWidth']
image['id'] = num + 1
if '\\' in data['imagePath']:
image['file_name'] = data['imagePath'].split('\\')[-1]
else:
image['file_name'] = data['imagePath'].split('/')[-1]
return image
def images_cityscape(data, num, img_file):
image = {}
image['height'] = data['imgHeight']
image['width'] = data['imgWidth']
image['id'] = num + 1
image['file_name'] = img_file
return image
def categories(label, labels_list):
category = {}
category['supercategory'] = 'component'
category['id'] = len(labels_list) + 1
category['name'] = label
return category
def annotations_rectangle(points, label, image_num, object_num, label_to_num):
annotation = {}
seg_points = np.asarray(points).copy()
seg_points[1, :] = np.asarray(points)[2, :]
seg_points[2, :] = np.asarray(points)[1, :]
annotation['segmentation'] = [list(seg_points.flatten())]
annotation['iscrowd'] = 0
annotation['image_id'] = image_num + 1
annotation['bbox'] = list(
map(float, [
points[0][0], points[0][1], points[1][0] - points[0][0], points[1][
1] - points[0][1]
]))
annotation['area'] = annotation['bbox'][2] * annotation['bbox'][3]
annotation['category_id'] = label_to_num[label]
annotation['id'] = object_num + 1
return annotation
def annotations_polygon(height, width, points, label, image_num, object_num,
label_to_num):
annotation = {}
annotation['segmentation'] = [list(np.asarray(points).flatten())]
annotation['iscrowd'] = 0
annotation['image_id'] = image_num + 1
annotation['bbox'] = list(map(float, get_bbox(height, width, points)))
annotation['area'] = annotation['bbox'][2] * annotation['bbox'][3]
annotation['category_id'] = label_to_num[label]
annotation['id'] = object_num + 1
return annotation
def get_bbox(height, width, points):
polygons = points
mask = np.zeros([height, width], dtype=np.uint8)
mask = PIL.Image.fromarray(mask)
xy = list(map(tuple, polygons))
PIL.ImageDraw.Draw(mask).polygon(xy=xy, outline=1, fill=1)
mask = np.array(mask, dtype=bool)
index = np.argwhere(mask == 1)
rows = index[:, 0]
clos = index[:, 1]
left_top_r = np.min(rows)
left_top_c = np.min(clos)
right_bottom_r = np.max(rows)
right_bottom_c = np.max(clos)
return [
left_top_c, left_top_r, right_bottom_c - left_top_c,
right_bottom_r - left_top_r
]
def deal_json(ds_type, img_path, json_path):
data_coco = {}
images_list = []
annotations_list = []
image_num = -1
object_num = -1
for img_file in os.listdir(img_path):
img_label = os.path.splitext(img_file)[0]
if img_file.split('.')[
-1] not in ['bmp', 'jpg', 'jpeg', 'png', 'JPEG', 'JPG', 'PNG']:
continue
label_file = osp.join(json_path, img_label + '.json')
print('Generating dataset from:', label_file)
image_num = image_num + 1
with open(label_file) as f:
data = json.load(f)
if ds_type == 'labelme':
images_list.append(images_labelme(data, image_num))
elif ds_type == 'cityscape':
images_list.append(images_cityscape(data, image_num, img_file))
if ds_type == 'labelme':
for shapes in data['shapes']:
object_num = object_num + 1
label = shapes['label']
if label not in labels_list:
categories_list.append(categories(label, labels_list))
labels_list.append(label)
label_to_num[label] = len(labels_list)
p_type = shapes['shape_type']
if p_type == 'polygon':
points = shapes['points']
annotations_list.append(
annotations_polygon(data['imageHeight'], data[
'imageWidth'], points, label, image_num,
object_num, label_to_num))
if p_type == 'rectangle':
(x1, y1), (x2, y2) = shapes['points']
x1, x2 = sorted([x1, x2])
y1, y2 = sorted([y1, y2])
points = [[x1, y1], [x2, y2], [x1, y2], [x2, y1]]
annotations_list.append(
annotations_rectangle(points, label, image_num,
object_num, label_to_num))
elif ds_type == 'cityscape':
for shapes in data['objects']:
object_num = object_num + 1
label = shapes['label']
if label not in labels_list:
categories_list.append(categories(label, labels_list))
labels_list.append(label)
label_to_num[label] = len(labels_list)
points = shapes['polygon']
annotations_list.append(
annotations_polygon(data['imgHeight'], data[
'imgWidth'], points, label, image_num, object_num,
label_to_num))
data_coco['images'] = images_list
data_coco['categories'] = categories_list
data_coco['annotations'] = annotations_list
return data_coco
def voc_get_label_anno(ann_dir_path, ann_ids_path, labels_path):
with open(labels_path, 'r') as f:
labels_str = f.read().split()
labels_ids = list(range(1, len(labels_str) + 1))
with open(ann_ids_path, 'r') as f:
ann_ids = [lin.strip().split(' ')[-1] for lin in f.readlines()]
ann_paths = []
for aid in ann_ids:
if aid.endswith('xml'):
ann_path = os.path.join(ann_dir_path, aid)
else:
ann_path = os.path.join(ann_dir_path, aid + '.xml')
ann_paths.append(ann_path)
return dict(zip(labels_str, labels_ids)), ann_paths
def voc_get_image_info(annotation_root, im_id):
filename = annotation_root.findtext('filename')
assert filename is not None
img_name = os.path.basename(filename)
size = annotation_root.find('size')
width = float(size.findtext('width'))
height = float(size.findtext('height'))
image_info = {
'file_name': filename,
'height': height,
'width': width,
'id': im_id
}
return image_info
def voc_get_coco_annotation(obj, label2id):
label = obj.findtext('name')
assert label in label2id, "label is not in label2id."
category_id = label2id[label]
bndbox = obj.find('bndbox')
xmin = float(bndbox.findtext('xmin'))
ymin = float(bndbox.findtext('ymin'))
xmax = float(bndbox.findtext('xmax'))
ymax = float(bndbox.findtext('ymax'))
assert xmax > xmin and ymax > ymin, "Box size error."
o_width = xmax - xmin
o_height = ymax - ymin
anno = {
'area': o_width * o_height,
'iscrowd': 0,
'bbox': [xmin, ymin, o_width, o_height],
'category_id': category_id,
'ignore': 0,
}
return anno
def voc_xmls_to_cocojson(annotation_paths, label2id, output_dir, output_file):
output_json_dict = {
"images": [],
"type": "instances",
"annotations": [],
"categories": []
}
bnd_id = 1 # bounding box start id
im_id = 0
print('Start converting !')
for a_path in tqdm(annotation_paths):
# Read annotation xml
ann_tree = ET.parse(a_path)
ann_root = ann_tree.getroot()
img_info = voc_get_image_info(ann_root, im_id)
output_json_dict['images'].append(img_info)
for obj in ann_root.findall('object'):
ann = voc_get_coco_annotation(obj=obj, label2id=label2id)
ann.update({'image_id': im_id, 'id': bnd_id})
output_json_dict['annotations'].append(ann)
bnd_id = bnd_id + 1
im_id += 1
for label, label_id in label2id.items():
category_info = {'supercategory': 'none', 'id': label_id, 'name': label}
output_json_dict['categories'].append(category_info)
output_file = os.path.join(output_dir, output_file)
with open(output_file, 'w') as f:
output_json = json.dumps(output_json_dict)
f.write(output_json)
def widerface_to_cocojson(root_path):
train_gt_txt = os.path.join(root_path, "wider_face_split", "wider_face_train_bbx_gt.txt")
val_gt_txt = os.path.join(root_path, "wider_face_split", "wider_face_val_bbx_gt.txt")
train_img_dir = os.path.join(root_path, "WIDER_train", "images")
val_img_dir = os.path.join(root_path, "WIDER_val", "images")
assert train_gt_txt
assert val_gt_txt
assert train_img_dir
assert val_img_dir
save_path = os.path.join(root_path, "widerface_train.json")
widerface_convert(train_gt_txt, train_img_dir, save_path)
print("Wider Face train dataset converts sucess, the json path: {}".format(save_path))
save_path = os.path.join(root_path, "widerface_val.json")
widerface_convert(val_gt_txt, val_img_dir, save_path)
print("Wider Face val dataset converts sucess, the json path: {}".format(save_path))
def widerface_convert(gt_txt, img_dir, save_path):
output_json_dict = {
"images": [],
"type": "instances",
"annotations": [],
"categories": [{'supercategory': 'none', 'id': 0, 'name': "human_face"}]
}
bnd_id = 1 # bounding box start id
im_id = 0
print('Start converting !')
with open(gt_txt) as fd:
lines = fd.readlines()
i = 0
while i < len(lines):
image_name = lines[i].strip()
bbox_num = int(lines[i + 1].strip())
i += 2
img_info = get_widerface_image_info(img_dir, image_name, im_id)
if img_info:
output_json_dict["images"].append(img_info)
for j in range(i, i + bbox_num):
anno = get_widerface_ann_info(lines[j])
anno.update({'image_id': im_id, 'id': bnd_id})
output_json_dict['annotations'].append(anno)
bnd_id += 1
else:
print("The image dose not exist: {}".format(os.path.join(img_dir, image_name)))
bbox_num = 1 if bbox_num == 0 else bbox_num
i += bbox_num
im_id += 1
with open(save_path, 'w') as f:
output_json = json.dumps(output_json_dict)
f.write(output_json)
def get_widerface_image_info(img_root, img_relative_path, img_id):
image_info = {}
save_path = os.path.join(img_root, img_relative_path)
if os.path.exists(save_path):
img = cv2.imread(save_path)
image_info["file_name"] = os.path.join(os.path.basename(
os.path.dirname(img_root)), os.path.basename(img_root),
img_relative_path)
image_info["height"] = img.shape[0]
image_info["width"] = img.shape[1]
image_info["id"] = img_id
return image_info
def get_widerface_ann_info(info):
info = [int(x) for x in info.strip().split()]
anno = {
'area': info[2] * info[3],
'iscrowd': 0,
'bbox': [info[0], info[1], info[2], info[3]],
'category_id': 0,
'ignore': 0,
'blur': info[4],
'expression': info[5],
'illumination': info[6],
'invalid': info[7],
'occlusion': info[8],
'pose': info[9]
}
return anno
def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument(
'--dataset_type',
help='the type of dataset, can be `voc`, `widerface`, `labelme` or `cityscape`')
parser.add_argument('--json_input_dir', help='input annotated directory')
parser.add_argument('--image_input_dir', help='image directory')
parser.add_argument(
'--output_dir', help='output dataset directory', default='./')
parser.add_argument(
'--train_proportion',
help='the proportion of train dataset',
type=float,
default=1.0)
parser.add_argument(
'--val_proportion',
help='the proportion of validation dataset',
type=float,
default=0.0)
parser.add_argument(
'--test_proportion',
help='the proportion of test dataset',
type=float,
default=0.0)
parser.add_argument(
'--voc_anno_dir',
help='In Voc format dataset, path to annotation files directory.',
type=str,
default=None)
parser.add_argument(
'--voc_anno_list',
help='In Voc format dataset, path to annotation files ids list.',
type=str,
default=None)
parser.add_argument(
'--voc_label_list',
help='In Voc format dataset, path to label list. The content of each line is a category.',
type=str,
default=None)
parser.add_argument(
'--voc_out_name',
type=str,
default='voc.json',
help='In Voc format dataset, path to output json file')
parser.add_argument(
'--widerface_root_dir',
help='The root_path for wider face dataset, which contains `wider_face_split`, `WIDER_train` and `WIDER_val`.And the json file will save in this path',
type=str,
default=None)
args = parser.parse_args()
try:
assert args.dataset_type in ['voc', 'labelme', 'cityscape', 'widerface']
except AssertionError as e:
print(
'Now only support the voc, cityscape dataset and labelme dataset!!')
os._exit(0)
if args.dataset_type == 'voc':
assert args.voc_anno_dir and args.voc_anno_list and args.voc_label_list
label2id, ann_paths = voc_get_label_anno(
args.voc_anno_dir, args.voc_anno_list, args.voc_label_list)
voc_xmls_to_cocojson(
annotation_paths=ann_paths,
label2id=label2id,
output_dir=args.output_dir,
output_file=args.voc_out_name)
elif args.dataset_type == "widerface":
assert args.widerface_root_dir
widerface_to_cocojson(args.widerface_root_dir)
else:
try:
assert os.path.exists(args.json_input_dir)
except AssertionError as e:
print('The json folder does not exist!')
os._exit(0)
try:
assert os.path.exists(args.image_input_dir)
except AssertionError as e:
print('The image folder does not exist!')
os._exit(0)
try:
assert abs(args.train_proportion + args.val_proportion \
+ args.test_proportion - 1.0) < 1e-5
except AssertionError as e:
print(
'The sum of pqoportion of training, validation and test datase must be 1!'
)
os._exit(0)
# Allocate the dataset.
total_num = len(glob.glob(osp.join(args.json_input_dir, '*.json')))
if args.train_proportion != 0:
train_num = int(total_num * args.train_proportion)
out_dir = args.output_dir + '/train'
if not os.path.exists(out_dir):
os.makedirs(out_dir)
else:
train_num = 0
if args.val_proportion == 0.0:
val_num = 0
test_num = total_num - train_num
out_dir = args.output_dir + '/test'
if args.test_proportion != 0.0 and not os.path.exists(out_dir):
os.makedirs(out_dir)
else:
val_num = int(total_num * args.val_proportion)
test_num = total_num - train_num - val_num
val_out_dir = args.output_dir + '/val'
if not os.path.exists(val_out_dir):
os.makedirs(val_out_dir)
test_out_dir = args.output_dir + '/test'
if args.test_proportion != 0.0 and not os.path.exists(test_out_dir):
os.makedirs(test_out_dir)
count = 1
for img_name in os.listdir(args.image_input_dir):
if count <= train_num:
if osp.exists(args.output_dir + '/train/'):
shutil.copyfile(
osp.join(args.image_input_dir, img_name),
osp.join(args.output_dir + '/train/', img_name))
else:
if count <= train_num + val_num:
if osp.exists(args.output_dir + '/val/'):
shutil.copyfile(
osp.join(args.image_input_dir, img_name),
osp.join(args.output_dir + '/val/', img_name))
else:
if osp.exists(args.output_dir + '/test/'):
shutil.copyfile(
osp.join(args.image_input_dir, img_name),
osp.join(args.output_dir + '/test/', img_name))
count = count + 1
# Deal with the json files.
if not os.path.exists(args.output_dir + '/annotations'):
os.makedirs(args.output_dir + '/annotations')
if args.train_proportion != 0:
train_data_coco = deal_json(args.dataset_type,
args.output_dir + '/train',
args.json_input_dir)
train_json_path = osp.join(args.output_dir + '/annotations',
'instance_train.json')
json.dump(
train_data_coco,
open(train_json_path, 'w'),
indent=4,
cls=MyEncoder)
if args.val_proportion != 0:
val_data_coco = deal_json(args.dataset_type,
args.output_dir + '/val',
args.json_input_dir)
val_json_path = osp.join(args.output_dir + '/annotations',
'instance_val.json')
json.dump(
val_data_coco,
open(val_json_path, 'w'),
indent=4,
cls=MyEncoder)
if args.test_proportion != 0:
test_data_coco = deal_json(args.dataset_type,
args.output_dir + '/test',
args.json_input_dir)
test_json_path = osp.join(args.output_dir + '/annotations',
'instance_test.json')
json.dump(
test_data_coco,
open(test_json_path, 'w'),
indent=4,
cls=MyEncoder)
if __name__ == '__main__':
"""
python tools/x2coco.py \
--dataset_type labelme \
--json_input_dir ./labelme_annos/ \
--image_input_dir ./labelme_imgs/ \
--output_dir ./mycoco/ \
--train_proportion 0.8 \
--val_proportion 0.2 \
--test_proportion 0.0
"""
main()
上面的代碼是從paddledetection拿來的(不得不說百度的的小腳本還是挺多的)，通過命令行參數(shù)：
python tools/x2coco.py \
--dataset_type labelme \
--json_input_dir ./labelme_annos/ \
--image_input_dir ./labelme_imgs/ \
--output_dir ./mycoco/ \
--train_proportion 0.8 \
--val_proportion 0.2 \
--test_proportion 0.0
- dataset_type：是將labelme轉(zhuǎn)為coco，鎖著這里默認(rèn)就是labelme
- json_input_dir：指向labelme的json文件所在路徑
- image_input_dir：指向labelme的img文件所在路徑（在這里json和img都是相同的路徑）
- output_dir ：轉(zhuǎn)為coco后輸出的文件夾路徑
- train_proportion、val_proportion、test_proportion：劃分?jǐn)?shù)據(jù)集比例，總之三者之和必須為1
成功執(zhí)行后就能看到mycoco文件夾：
注意：雖然現(xiàn)在目錄結(jié)構(gòu)上和coco一致了，但是在很多開源目標(biāo)檢測項(xiàng)目中，默認(rèn)的文件名字不太一樣，比如有的文件夾為train2017、val2017和test2017，或者annotations中的文件名為instances_train.json（多了一個(gè)s），請結(jié)合實(shí)際情況修改即可
3、標(biāo)簽可視化
經(jīng)過labelme的標(biāo)注和轉(zhuǎn)為coco格式后，我們希望可視化coco數(shù)據(jù)集，可以使用以下代碼：文章來源：http://www.zghlxwxcb.cn/news/detail-678945.html
import cv2
import os
from pycocotools.coco import COCO
labels=['eye','noise','mouth'] # 分類標(biāo)簽名
img_path = 'mycoco/train' # 比如我需要可視化train集
annFile = 'mycoco/annotations\instances_train.json' # 指定train集的json文件
save_path = 'mycoco/train_vis' # 可視化結(jié)果的保存路徑
if not os.path.exists(save_path):
os.makedirs(save_path)
def draw_rectangle(coordinates, image, image_name,color=(0,255,0),thickness=1,fontScale=0.5):
"""
@param coordinates: 所有框的信息[[left,top,right,bottom],[left,top,right,bottom],...]
@param image:
@param image_name:
@param color: 框和文字的顏色，默認(rèn)綠色
@param thickness: 框線條的粗細(xì)
@param fontScale: 字體大小
@return:
"""
for coordinate in coordinates: # 遍歷每一個(gè)框信息
left, top, right, bottom = map(int, coordinate[:-1])
label=coordinate[-1]
cv2.rectangle(image, (left, top), (right, bottom), color, thickness)
cv2.putText(image, str(label), (left, top), cv2.FONT_HERSHEY_SIMPLEX, fontScale, color, thickness)
cv2.imwrite(save_path + '/' + image_name, image)
coco = COCO(annFile)
imgIds = coco.getImgIds() # 獲取每張圖片的序號(hào)
for imgId in imgIds:
img = coco.loadImgs(imgId)[0] #加載圖片信息
image_name = img['file_name'] # 獲取圖片名字
annIds = coco.getAnnIds(imgIds=img['id'], catIds=[], iscrowd=None) # 根據(jù)圖片id獲取與該id相關(guān)聯(lián)的anno的序號(hào)
anns = coco.loadAnns(annIds) # 根據(jù)anno序號(hào)獲取anno信息
coordinates = []
img_raw = cv2.imread(os.path.join(img_path, image_name))
for j in range(len(anns)):
coordinate = anns[j]['bbox'] # 遍歷每一個(gè)anno，獲取到框信息，[left,top,width,heigh]
coordinate[2] += coordinate[0] # 計(jì)算得到right
coordinate[3] += coordinate[1] # 計(jì)算得到bottom
coordinate.append(labels[anns[j]['category_id']-1]) # 追加分類標(biāo)簽，形成[left,top,right,bottom,label]
coordinates.append(coordinate) # [[left,top,right,bottom],[left,top,right,bottom],...]
draw_rectangle(coordinates, img_raw, image_name)
就會(huì)得到標(biāo)注信息繪制后的圖：
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到了這里，關(guān)于使用LabelMe標(biāo)注目標(biāo)檢測數(shù)據(jù)集并轉(zhuǎn)換為COCO2017格式的文章就介紹完了。如果您還想了解更多內(nèi)容，請?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！
