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Validating that we get single pages

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This commit is contained in:
Jake Poznanski 2025-06-11 18:14:36 +00:00
parent 0689676026
commit 9a390e3d58
1 changed files with 32 additions and 6 deletions
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30
olmocr/train/dataloader.py
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@ -5,6 +5,8 @@ import base64
from io import BytesIO
from PIL import Image
from torch.utils.data import Dataset
from pypdf import PdfReader
from tqdm import tqdm
from olmocr.data.renderpdf import render_pdf_to_base64png
@ -27,7 +29,11 @@ class MarkdownPDFDocumentDataset(Dataset):
md_files = list(self.root_dir.rglob("*.md"))
# Verify each markdown file has a corresponding PDF
for md_path in md_files:
valid_count = 0
invalid_pdfs = []
print(f"Validating {len(md_files)} markdown-PDF pairs...")
for md_path in tqdm(md_files, desc="Validating PDFs"):
# Look for PDF with same stem (filename without extension)
pdf_path = md_path.with_suffix('.pdf')
@ -38,12 +44,32 @@ class MarkdownPDFDocumentDataset(Dataset):
# Verify the resolved path exists
if pdf_path.exists():
# Validate PDF - check it loads and has exactly one page
try:
reader = PdfReader(str(pdf_path))
num_pages = len(reader.pages)
if num_pages != 1:
invalid_pdfs.append((pdf_path, f"Expected 1 page, found {num_pages}"))
continue
self.samples.append({
'markdown_path': md_path,
'pdf_path': pdf_path
})
valid_count += 1
print(f"Found {len(self.samples)} valid markdown-PDF pairs")
except Exception as e:
invalid_pdfs.append((pdf_path, f"Failed to load: {str(e)}"))
print(f"Found {valid_count} valid markdown-PDF pairs")
if invalid_pdfs:
print(f"\nWarning: {len(invalid_pdfs)} invalid PDFs found:")
for pdf_path, reason in invalid_pdfs[:5]: # Show first 5
print(f" - {pdf_path.name}: {reason}")
if len(invalid_pdfs) > 5:
print(f" ... and {len(invalid_pdfs) - 5} more")
def __len__(self) -> int:
return len(self.samples)