fixes regression of imageSubFilter

OCR4all / LAREX

A semi-automatic open-source tool for Layout Analysis and Region EXtraction on early printed books.

MIT License

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Closed chaddy314 closed 3 years ago

chaddy314 commented 3 years ago

moves processing of SubExtensionFilter to request processing
switching between SubExtensions is now possible even if no SubExtensionFilter is set
pagexml from mets projects can now switch between images described under Page::imageFilename and AlternativeImage::filename
fixes #272