This is iscan-plugin-esdip
  written by SEIKO EPSON CORPORATION
  and maintained by SEIKO EPSON CORPORATION

The original source is non-free and cannot be made available.

Copyright (C) 2019 SEIKO EPSON Corporation

  This package is made available under the terms of the EPSON END USER
SOFTWARE LICENSE.  You should have received a verbatim copy of this license in
the package's documentation directory as COPYING.EPSON.en.txt.  A Japanese
translation is available as COPYING.EPSON.ja.txt.
