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Lossy JBIG2 has been removed due to well-documented risks of character substitution errors (e.g., 6/8 confusion). The --jbig2-lossy and --jbig2-page-group-size arguments are now deprecated and ignored with a warning. Changes: - Remove jbig2_lossy and jbig2_page_group_size from OCROptions - Simplify optimize.py to use single-image JBIG2 encoding only (no symbol dictionaries/JBIG2Globals) - Remove convert_group() from jbig2enc.py - Deprecate CLI args with warnings for backward compatibility - Update documentation to explain lossless-only JBIG2