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How does this compare to printed base 64, then OCR? It seems more robust to print and recognize text than binary patterns. You can always type it out if you are desperate.

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3750 characters/page at 6 bits/character gets you 22.5 kbits/page or ~2.8kB/page. Optar apparently does 200kB/page.

At minimum, I would want to use one of the encodings that avoids oO0il1 ambiguity. Maybe settle for hex in a pinch.

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