CCITT Group 4
Fax-era bi-level image compression commonly used for monochrome document scans.
Definition
Fax-era bi-level image compression commonly used for monochrome document scans.
Why it matters
Still appears in legacy scan workflows and archive imports.
Related PDFHQ workflows
Relevant to OCR pipelines and scanned PDF optimization.
Related Knowledge
TIFF
TIFF is a flexible high-fidelity raster image format used in scanning and publishing.
Image Compression
Image-specific size reduction methods used inside and outside PDFs.
OCR
Optical Character Recognition that turns scan images into machine-readable text.
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