Table of Contents:
* 00:00 Introduction
* 01:18 PVC frame construction
* 12:15 Cradle implementation
* 13:58 Platen implementation
* 16:22 Paracord (platen counterweight, camera trolly pulley mechanism) overview
* 18:52 Camera trolly mechanism explanation
* 23:25 Lighting overview
* 25:03 Scanner operation (explanation)
* 28:26 Scanner operation (demonstration)
* 29:29 Release of the scanner design into the Public Domain (via the CC0 license)
This video is an overview of a PVC (plumbing pipe) book scanner, which is small enough to fit into a backpack when disassembled. It can be re-assembled in under 10 minutes. It does not require any power tools to construct. The only required tools are a tape measure, a PVC cutting tool, and scissors.
The scanner uses a single camera to take intentionally keystoned photographs of each two pages in a book, held open at a 90-degree angle to one another (thus, each page is 45 degrees off from the camera). The scanner features a trolly system to lower the camera as the book is scanned, causing the keystoned pages at every point of the book to stay in the same spatial relationship with the camera. The pictures of these pages can then be batch de-keystoned in (free) software, such as Darktable. In addition to hardcover books, the scanner also works well with paperback books and magazines.
Amendment / Erratum:
* At 10:49, the video covers how the vertical arm holding the camera trolly is (in the build shown) at a slight angle. Ideally, this arm *would* be straight up and down. Correcting this is a matter of re-arranging the PVC pipe and fittings on the top back assembly (i.e., the row of pipe and fittings on the back, top side of the scanner); it has subsequently been corrected in my scanner.
See http://diybookscanner.org/ for more scanner designs and discussion. The DIY Book Scanner community, and its original founder Daniel Reetz, spent years building this community and conducting research into inexpensive book scanning technology. The scanner design shown here, while original, has been inspired by many posts in the community’s website’s forums, especially including Mr. David Landin (see, e.g., https://www.youtube.com/watch?v=ns3jGFbJvXI), who was possibly the first member of the community to use PVC for the major part of a build.
The scanner design and video are © Jacob Levernier 2016. Jacob can be contacted through http://adunumdatum.org. As mentioned above, the scanner design is released into the Public Domain (or its nearest equivalent internationally) via the Creative Commons CC0 license (https://creativecommons.org/publicdomain/zero/1.0/). The video and related write-ups are released under a Creative Commons Attribution-ShareAlike 4.0 license (https://creativecommons.org/licenses/by-sa/4.0/); if you would like to arrange a different license arrangement to re-use these materials, please contact Jacob to make an arrangement.