#!/usr/bin/env python3
# The MIT License (MIT)
#
# Copyright (c) 2016 John Chong
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import os
import shutil
from collections import OrderedDict
import argparse
import io
import logging
import img2pdf
from PIL import Image
from PyPDF2 import PdfReader
def is_gray(a, b, c):
r = 40
if a + b + c < 350:
return True
if abs(a - b) > r:
return False
if abs(a - c) > r:
return False
if abs(b - c) > r:
return False
return True
def remove_watermark(image):
image = image.convert("RGB")
color_data = image.getdata()
new_color = []
for item in color_data:
if is_gray(item[0], item[1], item[2]):
new_color.append(item)
else:
new_color.append((255, 255, 255))
image.putdata(new_color)
return image
def process_page(pdf, page_index, skipped):
content = pdf.pages[page_index]['/Resources']['/XObject'].get_object()
images = {}
for obj in content:
if content[obj]['/Subtype'] == '/Image':
size = (content[obj]['/Width'], content[obj]['/Height'])
data = content[obj]._data
if content[obj]['/ColorSpace'] == '/DeviceRGB':
mode = "RGB"
else:
mode = "P"
if content[obj]['/Filter'] == '/FlateDecode':
img = Image.frombytes(mode, size, data)
else:
img = Image.open(io.BytesIO(data))
images[int(obj[3:])] = img
images = OrderedDict(sorted(images.items())).values()
widths, heights = zip(*(i.size for i in images))
total_height = sum(heights)
max_width = max(widths)
concat_image = Image.new('RGB', (max_width, total_height))
offset = 0
for i in images:
concat_image.paste(i, (0, offset))
offset += i.size[1]
if not skipped:
concat_image = remove_watermark(concat_image)
concat_image.save("./temp/{}.jpg".format(page_index))
def main():
parser = argparse.ArgumentParser()
parser.add_argument('input_pdf_path', metavar='PATH')
parser.add_argument('-o', '--output', metavar='out', type=argparse.FileType('wb'),
help='Output PDF file')
parser.add_argument('-s', '--skip', type=int, default=0,
help='Skip over the first n page(s).')
args = parser.parse_args()
logger = logging.getLogger(__name__)
logging.basicConfig(level='INFO', format='%(asctime)s - %(levelname)s - %(message)s')
directory = './temp/'
if not os.path.exists(directory):
os.makedirs(directory)
images_path = []
pdf = PdfReader(open(args.input_pdf_path, "rb"))
for i in range(0, len(pdf.pages)):
logger.info("Processing page {}/{}".format(i + 1, len(pdf.pages)))
images_path.append("./temp/{}.jpg".format(i))
process_page(pdf, i, i < args.skip)
logger.info('Writing to output PDF file')
args.output.write(img2pdf.convert(*list(map(img2pdf.input_images, images_path))))
logger.info('Done')
shutil.rmtree(directory, True)
if __name__ == '__main__':
main()
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