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The main stream of global copyright protects both content and compilation. Even when the content too old that is beyond protection, its compilation may still within protection.
That is, one can't just take other's compilation without agreement, enen when the content in that compilation is not within protection. Unless one makes some effort to extract content from the compilation and make his own compilation.
So, if one can extract content from pre-scanned image to text or pdf, the commercial limitation will not be applied.
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