QuantaraScanned PDF BOQ Processing with OCR-Assisted Review
Scanned PDF processing utilizes Optical Character Recognition (OCR) to identify and extract text and tabular data from image-based documents, converting physical or flattened records into workable digital data.
Who Uses OCR Processing?
OCR is vital for teams dealing with legacy documents or physical tender packages.
- Estimators receiving physical printouts
- Contractors archiving legacy project data
- Consultants processing third-party hardcopies
- Subcontractors dealing with faxed or low-quality scans
The Challenge of Image-Based Documents
Unlike text-based PDFs where the digital characters are stored in the file, a scanned PDF is essentially just a photograph of a document. Computers cannot natively "read" photographs, making standard copy-pasting impossible.
When dealing with scanned BOQs, teams face issues like page skew (crooked scanning), blurred text, coffee stains, and handwritten annotations. Converting this back into a structured spreadsheet manually can take weeks for a large project.
OCR-Assisted Data Recovery
Quantara applies advanced OCR technology specifically tuned for tabular data. It attempts to reconstruct the grid of the BOQ, identifying columns and rows even when the scan is slightly skewed.
Because OCR is inherently less accurate than text-based extraction—especially with numbers (e.g., misreading a "0" as an "O", or a "5" as an "S")—Quantara enforces a strict, item-by-item human review workflow.
Relevant Features
OCR Processing
Convert image-based text into selectable digital data.
Skew Correction
Automatically adjust slightly crooked scans.
Validation Workflow
Mandatory human review step for OCR results.
Recovering a Legacy BOQ
How a team digitizes a physical tender package:
Scan & Upload
The physical 50-page document is scanned to PDF and uploaded.
OCR Processing
Quantara runs OCR to identify text and table structures.
Intensive Review
The estimator carefully checks every quantity, knowing OCR is prone to number confusion.
Correction
Misread characters (e.g., 'O' instead of '0') are manually corrected.
Data Structuring
The clean data is organized into the digital BOQ hierarchy.
Supported Inputs
Scanned PDF
LiveImage-based documents processed via OCR.
Text-based PDF
LiveDigital PDFs (processed without OCR for higher accuracy).
Supported Outputs
Structured Database
LiveCentralized project storage.
XLSX Export
LiveExporting clean, tabular data to Excel.
Current Limitations
- OCR accuracy drops significantly with low-resolution scans (under 300 DPI).
- Heavily skewed, blurred, or crumpled documents may fail extraction entirely.
- Handwritten annotations are generally not supported and will require manual entry.
Professional Disclaimer
Quantara assists with document extraction, BOQ organization, project records, templates and supported document-generation workflows. All extracted information, quantities, units, specifications, rates, assumptions, exclusions and generated documents must be reviewed by a qualified estimator, quantity surveyor, engineer or responsible project professional before tender, procurement, contractual or construction use.
Frequently Asked Questions
A scanned PDF is an image-based file (like a photograph) where the text cannot be highlighted or selected by a computer natively.
OCR (Optical Character Recognition) analyzes the shapes of the ink or pixels in the image and attempts to translate them into digital characters and tables.
Yes. OCR frequently confuses visually similar characters, such as 1 and l, or 0 and O. Strict manual review is absolutely critical.
Immensely. Scans should ideally be 300 DPI or higher. Low-quality or compressed scans will result in poor extraction.
Standard OCR struggles heavily with handwriting. While it may capture some clear block letters, handwritten BOQs generally require manual data entry.
Every single item, unit, and especially quantity must be manually cross-referenced against the original scanned image.
Once the data is extracted, reviewed, and structured, it can be exported to standard formats like XLSX.
No, Quantara processes text and tables from scanned documents, not measurements from scanned drawings.