Error: Undefined variable “vision” or class “vision.Fa​sterRCNNOb​jectDetect​or” in Matlab 2019a.

Hello Matlab - Community,

by using the function detector = vision.FasterRCNNObjectDetector, Matlab shows the error Undefined variable “vision” or class “vision.FasterRCNNObjectDetector”

Why does this error occur? Computer Vision Toolbox is installed. Does anyone know how to solve it ? Thanks in advance.

Answer 1

[Walter Roberson]

You should not construct a fastRCNNObjectDetector yourself. You should call https://www.mathworks.com/help/vision/ref/trainfastrcnnobjectdetector.html to construct the object.

Constructing these objects requires that you also have the Deep Learning Toolbox installed.