Blame view
egs/rimes/v1/local/process_data.py
5.06 KB
8dcb6dfcb
first commit
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 |
#!/usr/bin/env python3
""" This script reads xml file and creates the following files :text, utt2spk, images.scp.
It also creates line images from page image and stores it into
data/local/rimes_data/train/lines.
Eg. local/process_data.py data/local/rimes_data/train train
Eg. text file: writer000000_train2011-0_000001 Je vous adresse ce courrier afin
utt2spk file: writer000000_train2011-0_000001 writer000000
images.scp file: writer000000_train2011-0_000001 \
data/local/rimes_data/train/lines/train2011-0_000001.png
"""
import argparse
import xml.dom.minidom as minidom
from PIL import Image
import os
import random
parser = argparse.ArgumentParser(description="""Creates line images from page image.""")
parser.add_argument('database_path', type=str,
help='Path to the downloaded (and extracted) mdacat data')
parser.add_argument('dataset', type=str,
help='Subset of data to process.')
parser.add_argument("--augment", type=lambda x: (str(x).lower()=='true'), default=False,
help="performs image augmentation")
parser.add_argument('--pixel-scaling', type=int, default=20,
help='padding across horizontal/verticle direction')
args = parser.parse_args()
def expand_aabb(left, right, top, bottom, delta_pixel):
""" Increases size of axis aligned bounding box (aabb).
"""
left = left - delta_pixel
right = right + delta_pixel
top = top - delta_pixel
bottom = bottom + delta_pixel
return left, right, top, bottom
def get_line_images_from_page_image(file_name, left, right, top, bottom, line_id):
""" Given a page image, extracts the line images from it.
Input
-----
file_name (string): name of the page image.
left, right, top, bottom (int): coordinates corresponding to the line image.
line_id (int): line number on the page image.
"""
page_image_path = os.path.join(page_image_folder, file_name)
im = Image.open(page_image_path)
box = (left, top, right, bottom)
region = im.crop(box)
base_name = os.path.splitext(os.path.basename(file_name))[0]
line_image_file_name = base_name + '_' + str(line_id).zfill(6) + '.png'
imgray = region.convert('L')
line_image_path = os.path.join(args.database_path, 'line_image', args.dataset, line_image_file_name)
imgray.save(line_image_path)
return base_name, line_image_path
def write_kaldi_process_data_files(base_name, line_id, text):
"""creates files requires for dictionary and feats.scp.
Input
-----
image_path (string): name of the page image.
line_id (str): line number on the page image.
text: transcription of the line image.
base_name (string):
"""
writer_id = str(base_name.split('-')[1])
writer_id = str(writer_id).zfill(6)
writer_id = 'writer' + writer_id
utt_id = writer_id + '_' + base_name + '_' + str(line_id).zfill(6)
line_image_file_name = base_name + '_' + str(line_id).zfill(6) + '.png'
image_path = os.path.join(args.database_path, 'line_image', args.dataset, line_image_file_name)
text_fh.write(utt_id + ' ' + text + '
')
utt2spk_fh.write(utt_id + ' ' + writer_id + '
')
image_fh.write(utt_id + ' ' + image_path + '
')
### main ###
text_file = os.path.join('data', args.dataset, 'text')
text_fh = open(text_file, 'w', encoding='utf-8')
utt2spk_file = os.path.join('data', args.dataset, 'utt2spk')
utt2spk_fh = open(utt2spk_file, 'w', encoding='utf-8')
image_file = os.path.join('data', args.dataset, 'images.scp')
image_fh = open(image_file, 'w', encoding='utf-8')
xml_path = os.path.join(args.database_path, 'xml', args.dataset) + '/rimes_2011.xml'
page_image_folder = os.path.join(args.database_path, 'page_image', args.dataset)
doc = minidom.parse(xml_path)
single_page = doc.getElementsByTagName('SinglePage')
for page in single_page:
file_name = page.getAttribute('FileName')
line = page.getElementsByTagName('Line')
id = 0
for node in line:
id += 1
bottom = int(node.getAttribute('Bottom'))
left = int(node.getAttribute('Left'))
right = int(node.getAttribute('Right'))
top = int(node.getAttribute('Top'))
text = node.getAttribute('Value')
text_vect = text.split() # this is to avoid non-utf-8 spaces
text = " ".join(text_vect)
if args.augment:
base_name, image_path = get_line_images_from_page_image(file_name, left, right, top, bottom, str(id))
write_kaldi_process_data_files(base_name, str(id), text)
additional_pixel = random.randint(1, args.pixel_scaling)
left, right, top, bottom = expand_aabb(left, right, top, bottom, args.pixel_scaling + additional_pixel + 1)
line_id = str(id) + '_scale' + str(2)
base_name, image_path = get_line_images_from_page_image(file_name, left, right, top, bottom, line_id)
write_kaldi_process_data_files(base_name, line_id, text)
else:
base_name, image_path = get_line_images_from_page_image(file_name, left, right, top, bottom, str(id))
write_kaldi_process_data_files(base_name, str(id), text)
|