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# Copyright (c) OpenMMLab. All rights reserved.
import argparse
import os
import os.path as osp
import mmcv
import mmengine
import numpy as np
from mmocr.utils import dump_ocr_data
def collect_files(img_dir, gt_dir):
"""Collect all images and their corresponding groundtruth files.
Args:
img_dir (str): The image directory
gt_dir (str): The groundtruth directory
Returns:
files (list): The list of tuples (img_file, groundtruth_file)
"""
assert isinstance(img_dir, str)
assert img_dir
assert isinstance(gt_dir, str)
assert gt_dir
ann_list, imgs_list = [], []
for img in os.listdir(img_dir):
imgs_list.append(osp.join(img_dir, img))
ann_list.append(osp.join(gt_dir, 'gt_' + img.replace('jpg', 'txt')))
files = list(zip(imgs_list, ann_list))
assert len(files), f'No images found in {img_dir}'
print(f'Loaded {len(files)} images from {img_dir}')
return files
def collect_annotations(files, nproc=1):
"""Collect the annotation information.
Args:
files (list): The list of tuples (image_file, groundtruth_file)
nproc (int): The number of process to collect annotations
Returns:
images (list): The list of image information dicts
"""
assert isinstance(files, list)
assert isinstance(nproc, int)
if nproc > 1:
images = mmengine.track_parallel_progress(
load_img_info, files, nproc=nproc)
else:
images = mmengine.track_progress(load_img_info, files)
return images
def load_img_info(files):
"""Load the information of one image.
Args:
files (tuple): The tuple of (img_file, groundtruth_file)
Returns:
img_info (dict): The dict of the img and annotation information
"""
assert isinstance(files, tuple)
img_file, gt_file = files
# read imgs while ignoring orientations
img = mmcv.imread(img_file, 'unchanged')
img_info = dict(
file_name=osp.join(osp.basename(img_file)),
height=img.shape[0],
width=img.shape[1],
segm_file=osp.join(osp.basename(gt_file)))
if osp.splitext(gt_file)[1] == '.txt':
img_info = load_txt_info(gt_file, img_info)
else:
raise NotImplementedError
return img_info
def load_txt_info(gt_file, img_info):
"""Collect the annotation information.
# Annotation Format
# x1, y1, x2, y2, x3, y3, x4, y4, transcript
Args:
gt_file (str): The path to ground-truth
img_info (dict): The dict of the img and annotation information
Returns:
img_info (dict): The dict of the img and annotation information
"""
with open(gt_file) as f:
anno_info = []
annotations = f.readlines()
for ann in annotations:
try:
ann_box = np.array(ann.split(',')[0:8]).astype(int).tolist()
except ValueError:
# skip invalid annotation line
continue
x = max(0, min(ann_box[0::2]))
y = max(0, min(ann_box[1::2]))
w, h = max(ann_box[0::2]) - x, max(ann_box[1::2]) - y
bbox = [x, y, w, h]
segmentation = ann_box
word = ann.split(',')[-1].replace('\n', '').strip()
anno = dict(
iscrowd=0 if word != '###' else 1,
category_id=1,
bbox=bbox,
area=w * h,
segmentation=[segmentation])
anno_info.append(anno)
img_info.update(anno_info=anno_info)
return img_info
def parse_args():
parser = argparse.ArgumentParser(
description='Generate training and val set of DeText ')
parser.add_argument('root_path', help='Root dir path of DeText')
parser.add_argument(
'--nproc', default=1, type=int, help='Number of process')
args = parser.parse_args()
return args
def main():
args = parse_args()
root_path = args.root_path
for split in ['training', 'val']:
print(f'Processing {split} set...')
with mmengine.Timer(
print_tmpl='It takes {}s to convert DeText annotation'):
files = collect_files(
osp.join(root_path, 'imgs', split),
osp.join(root_path, 'annotations', split))
image_infos = collect_annotations(files, nproc=args.nproc)
dump_ocr_data(image_infos,
osp.join(root_path, 'instances_' + split + '.json'),
'textdet')
if __name__ == '__main__':
main()
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