[Feature]: Pagewise ocr

[ashrockd]

Describe the proposed feature

If my pdf file has a text/ocr layer on page 1, then ocrmypdf skips it entirely. This is obviated by using --force-ocr, however, is it possible for the script to handle the edge cases where some pages may have text/ocr layer while others do not.

for one file i can manually run --force-ocr, but finding files skipped by ocrmypdf and manually running them through ---force-ocr makes me wonder if there is a better way.

[jbarlow83]

--skip-text does what you're looking for you - applies OCR on pages with no text, skips it on those that have text.