/usr/lib/perl5/Imager/include/ is in libimager-perl 0.98+dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/perl5/Imager/include/draw.h
/usr/lib/perl5/Imager/include/dynaload.h
/usr/lib/perl5/Imager/include/ext.h
/usr/lib/perl5/Imager/include/feat.h
/usr/lib/perl5/Imager/include/imager.h
/usr/lib/perl5/Imager/include/imageri.h
/usr/lib/perl5/Imager/include/imconfig.h
/usr/lib/perl5/Imager/include/imdatatypes.h
/usr/lib/perl5/Imager/include/imerror.h
/usr/lib/perl5/Imager/include/imext.h
/usr/lib/perl5/Imager/include/imextdef.h
/usr/lib/perl5/Imager/include/imextpl.h
/usr/lib/perl5/Imager/include/imextpltypes.h
/usr/lib/perl5/Imager/include/imexttypes.h
/usr/lib/perl5/Imager/include/imio.h
/usr/lib/perl5/Imager/include/immacros.h
/usr/lib/perl5/Imager/include/imperl.h
/usr/lib/perl5/Imager/include/imperlio.h
/usr/lib/perl5/Imager/include/imrender.h
/usr/lib/perl5/Imager/include/iolayer.h
/usr/lib/perl5/Imager/include/iolayert.h
/usr/lib/perl5/Imager/include/log.h
/usr/lib/perl5/Imager/include/plug.h
/usr/lib/perl5/Imager/include/ppport.h
/usr/lib/perl5/Imager/include/regmach.h
/usr/lib/perl5/Imager/include/rendert.h
/usr/lib/perl5/Imager/include/stackmach.h