/usr/include/tesseract/ is in libtesseract-dev 4.00~git2288-10f4998a-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/tesseract/apitypes.h
/usr/include/tesseract/baseapi.h
/usr/include/tesseract/basedir.h
/usr/include/tesseract/capi.h
/usr/include/tesseract/convolve.h
/usr/include/tesseract/ctc.h
/usr/include/tesseract/dotproductavx.h
/usr/include/tesseract/dotproductsse.h
/usr/include/tesseract/errcode.h
/usr/include/tesseract/fileerr.h
/usr/include/tesseract/fullyconnected.h
/usr/include/tesseract/functions.h
/usr/include/tesseract/genericvector.h
/usr/include/tesseract/helpers.h
/usr/include/tesseract/host.h
/usr/include/tesseract/input.h
/usr/include/tesseract/intsimdmatrix.h
/usr/include/tesseract/intsimdmatrixavx2.h
/usr/include/tesseract/intsimdmatrixsse.h
/usr/include/tesseract/lstm.h
/usr/include/tesseract/lstmrecognizer.h
/usr/include/tesseract/lstmtrainer.h
/usr/include/tesseract/ltrresultiterator.h
/usr/include/tesseract/maxpool.h
/usr/include/tesseract/memry.h
/usr/include/tesseract/ndminx.h
/usr/include/tesseract/network.h
/usr/include/tesseract/networkbuilder.h
/usr/include/tesseract/networkio.h
/usr/include/tesseract/networkscratch.h
/usr/include/tesseract/ocrclass.h
/usr/include/tesseract/osdetect.h
/usr/include/tesseract/pageiterator.h
/usr/include/tesseract/parallel.h
/usr/include/tesseract/params.h
/usr/include/tesseract/platform.h
/usr/include/tesseract/plumbing.h
/usr/include/tesseract/publictypes.h
/usr/include/tesseract/recodebeam.h
/usr/include/tesseract/reconfig.h
/usr/include/tesseract/renderer.h
/usr/include/tesseract/resultiterator.h
/usr/include/tesseract/reversed.h
/usr/include/tesseract/serialis.h
/usr/include/tesseract/series.h
/usr/include/tesseract/simddetect.h
/usr/include/tesseract/static_shape.h
/usr/include/tesseract/stridemap.h
/usr/include/tesseract/strngs.h
/usr/include/tesseract/tess_version.h
/usr/include/tesseract/tesscallback.h
/usr/include/tesseract/tfnetwork.h
/usr/include/tesseract/thresholder.h
/usr/include/tesseract/unichar.h
/usr/include/tesseract/unicharcompress.h
/usr/include/tesseract/unicharmap.h
/usr/include/tesseract/unicharset.h
/usr/include/tesseract/weightmatrix.h