TEXT FIELD GUIDE
Capture the page before extracting text
A document image preserves layout, stamps, signatures, marginal notes and visual relationships. OCR produces a text interpretation of that image. The two outputs have different roles and should remain linked. Searchable text is useful for discovery, but it should not be treated as a perfect transcription.
Page size, contrast, typeface, handwriting, skew, bleed-through, folds and damage can affect results. Documents with multiple columns or complex forms may need additional review because reading order is not always obvious to software.
Preparation and sequence
Document preparation should focus on safe readiness and clear order. Do not flatten, clean or repair fragile material without suitable expertise. Existing folders, numbering and separators can provide important context and should be recorded before changes are considered.
Page sequencing is particularly important for correspondence, reports and dossiers. A missing page, duplicate image or reversed sheet can change meaning. A simple sequence log helps separate a source issue from a capture issue.
OCR limitations
OCR is pattern recognition. It interprets shapes according to the language, layout and image conditions presented to it. Historic spelling, unusual characters, faded ink and mixed languages may produce errors. A text layer can therefore be excellent for broad discovery while remaining unsuitable as a definitive scholarly transcription.
For high-value or high-risk use, define a review level. Some collections need only searchable text; others need corrected transcription, page-level verification or specialist editorial treatment. The distinction should be visible in the metadata.
Quality control
Quality review can compare page count, image sequence, legibility and text-layer presence. Sampling text against source images can reveal recurring problems, but a sample cannot prove that every word is correct. Record the method and scope of review so users understand what the text layer represents.
Accessibility benefits from text alternatives, logical reading order and clear document structure. However, accessibility should not be promised solely because OCR was applied. A usable interface, descriptive metadata and appropriate contrast remain important.
Searchable archive design
Search works best when OCR is combined with descriptive metadata. A title, date, correspondent, subject or series field can make a collection discoverable even when the OCR layer is incomplete. Keep source images available so users can check context and ambiguity.
Planning checklist
- Define whether the primary output is image, text, or both.
- Record document order, folders, separators and exceptions.
- Identify languages, handwriting, forms and difficult layouts.
- Set realistic OCR review and correction requirements.
- Link text, source image, metadata and accessibility information.
Good for
This approach suits administrative records, correspondence, reports, pamphlets, typed collections and searchable research resources.
What to know
OCR cannot restore information absent from the source image and cannot guarantee interpretation. Exact results depend on material and processing choices. Keep the original image as the authority for visual evidence.