This processing tool will connect to your webcam and analyze its the mean color. It generates three values (r, g, b) that will be displayed on the box below and can be sent to Wekinator via OSC clicking on the start button. The three values are remapped to 0 and 1 for simplicity. This feature extractor will map different frames to different colors and can be used to control synthesizers or similar sound generators when parameters should be controlled by a value that can describe an image in its wholeness.
This processing is developed using processing 3.5.4 and should run easily on every 3.x version. You'll need to install the two libraries processing.video and oscP5 by clicking Tools > Add Tool... > Libraries and searching for them. Once everything is set up you can run it. Well, you'll need a webcam, that goes without saying.
Open it, your webcam will start capturing images and the corresponding block will be filled with the mean color. Click on START OSC and the osc messages stream will start. STOP OSC will end it.