Journal of Perceptual Imaging (JPI) papers are free to download and read, but are not strictly OA. Copyright varies by paper.
You may either search by topic, title, and/or author from the main Digital Library page to find papers within any publication OR you may search directly from the JPI DL page for any paper published in JPI.
JPI papers offer a "copy citation" option. We suggest using this for accuracy.
If it is missing for a paper, you can use
Author(s), "Title", J. Perceptual Imaging, volume, issue, page#, full date, DOI: [insert]