Scanning
1-2 sentence factual description of the cluster's scope
21 live pages · long-term capacity 28–46
Entities
standard
TWAIN · ISO 12233 resolution test
technology
WIA (Windows Image Acquisition) · SANE · CCD (charge-coupled device) sensor · CIS (contact image sensor)
concept
Optical resolution · Color depth (bit depth) · DPI (dots per inch) · PPI (pixels per inch) · Optical character recognition (OCR) · Automatic document feeder (ADF) · Dynamic range
format
TIFF · JPEG · PNG · PDF/A · ICC profile
organization
International Color Consortium (ICC) · ISO
Connected clusters
In the archive
Pages in this cluster
- Flatbed Scanners
- Sheet-Fed Scanners
- Document scanners
- Drum Scanners
- Portable Scanners
- Printer Profiling
- DPI (Dots Per Inch)
- History of Scanning
- ADF Scanners (Automatic Document Feeders)
- Scanner Driver Architecture
- Optical character recognition (OCR)
- OCR Engines
- OCR for Forms
- OCR for Receipts
- OCR for Legal Documents
- Batch Scanning
- OCR (Optical Character Recognition)
- Understanding Printer Resolution
- Film Scanners
- Multifunction (MFP) Scanning
- Scan-to-Cloud Workflow
- History of OCR
- OCR Limitations
- OCR for Archives
Planned coverage
- How Sheetfed Scanners Work — Moving-paper (fixed-sensor) design and how it differs from flatbed capture for stacks of documents.
- Optical vs Interpolated Scan Resolution — Why optical resolution is the real capability and interpolation only adds software-estimated pixels.
- Understanding Color Depth in Scanning — What 8-bit, 24-bit, and higher bit depths mean for tonal gradation and why extra bits help editing.
- TWAIN vs WIA Scanning Standards — Two acquisition interfaces on Windows: what each is, who maintains them, and how applications use them.
- What Is the TWAIN Standard — The cross-platform image-acquisition API, its data source model, and its role between apps and scanners.
- What Is SANE (Scanner Access Now Easy) — The Unix/Linux scanner API, its backend/frontend architecture, and how it enables device support.
- Scan Resolution vs Print Resolution — Why the same DPI number means different things when capturing versus placing dots on paper.
- Choosing the Right Scan Resolution — How intended use (text, archival, photo enlargement) determines a sensible optical resolution.
- Grayscale vs Color Scanning — When single-channel grayscale is sufficient and how color mode affects file size and OCR.
- What Is Duplex Scanning — Single-pass vs two-pass double-sided scanning and how blank-page removal fits in.
- Understanding Scanner Color Management — How ICC profiles and calibration keep captured color consistent across devices.
- Understanding Dynamic Range in Scanning — What dynamic range means for capturing shadow and highlight detail, especially in film and photos.
- How Film and Slide Scanners Work — Transmissive scanning of negatives and transparencies and why it differs from reflective document scanning.
- How OCR Turns Scans Into Text — The recognition pipeline from bitmap to characters and why scan quality drives accuracy.
- Choosing a Scan File Format — When TIFF, JPEG, PNG, or PDF/A suit archival, sharing, or editable-document needs.