/usr/share/doc/elpa-visual-regexp/visual-regexp1B.png is in elpa-visual-regexp 1.1.1-1.
This file is owned by root:root, with mode 0o644.
However, this file being a binary blob, APT Browse does not store it.
Download the package archive to access the file: http://archive.ubuntu.com/ubuntu/pool/universe/v/visual-regexp-el/elpa-visual-regexp_1.1.1-1_all.deb
.