AI engineering glossary · Computer vision
What is RPN (region proposal network)?
Region proposal network (also called RPN): A small network attached to a backbone that scores anchors for objectness and refines their boxes, outputting candidate regions. It replaced slow hand-crafted proposal methods in Faster R-CNN. Because it shares computation with the classifier, proposals cost little extra time.
Region proposal network: an example
For each location on a 38 x 50 feature map with 9 anchors, the RPN outputs 9 objectness scores and 9 box adjustments.
Related terms
More Computer vision terms
Where you learn it
Region proposal network is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.