Module utils 

Shared utility functions.

Modules

diff

Document diff — compares two PdfDocument instances to detect structural changes.

font_metrics_cache

Font metrics cache — caches computed string widths and font measurements to avoid redundant calculations during pipeline stages.

image_dedup

Image deduplication — identifies duplicate images across pages using content hashing to reduce output size and improve processing.

language_detector

Simple trigram-based language detection.

layout_analysis

Layout analysis utilities — page geometry classification, margin detection, and content density analysis for multi-column and complex layouts.

page_range

Page range parsing and filtering.

sanitizer

Content sanitization — PII masking, Unicode normalization.

statistics

Font and text statistics.

text_normalizer

Text normalization for PDF-extracted text.

xref_index

Cross-reference builder — creates an index mapping element IDs to their locations and relationships across the document.

xycut

XY-Cut++ reading order algorithm.