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import os
from io import BytesIO
from tqdm import tqdm
from typing import Callable, Dict, List, Literal, NamedTuple, Optional, Tuple, Union
from datasets import load_dataset, logging
from PIL import Image
import fitz as PyMuPDF
logger = logging.get_logger(__name__)
def pymupdf_image_extraction(data: bytes):
images = []
with PyMuPDF.open(stream=data, filetype="pdf") as pdf_file:
for page_index in range(len(pdf_file)):
page = pdf_file[page_index]
for image_index, img in enumerate(page.get_images(), start=1):
xref = img[0]
base_image = pdf_file.extract_image(xref)
image_bytes = base_image["image"]
im = Image.open(BytesIO(image_bytes))
images.append(im) #<PIL.PngImagePlugin.PngImageFile image mode=L size=2560x3320 at 0x7FD32E7430A0>
return images
def batch_get_images(streams):
return {
"images":
[pymupdf_image_extraction(pdf_stream) for pdf_stream in tqdm(streams, desc="get_images")]
}
def pymupdf_page_extraction(pdf_stream):
try:
return len(PyMuPDF.open(stream=pdf_stream, filetype="pdf"))
except Exception as e:
logger.warning(f"{e}")
return 0
def batch_get_pages(streams):
return {
"pages":
[pymupdf_page_extraction(pdf_stream) for pdf_stream in tqdm(streams, desc="get_pages")],
}
testds = load_dataset("jordyvl/rvl_cdip_multi", cache_dir="/mnt/lerna/data/HFcache", split="test", revision="d3a654c9f63f14d0aaa94e08aa30aa3dc20713c1")
func = lambda batch: batch_get_pages(batch["file"])
testds = testds.map(func, batched=True, keep_in_memory=False)
testds = testds.filter(lambda example: example["pages"] != 0)
func = lambda batch: batch_get_images(batch["file"])
testds = testds.map(func, batched=True, keep_in_memory=False)
import pdb; pdb.set_trace() # breakpoint 70086661 //
"""
Filter based on page count?
"""
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