Finding HSV values for any color

by Sampada Pokharel

This is a quick guide to finding the HSV values for any color that you may need for you project. We found this particularly helpful for following a line.

Prerequisite

• A robot with a camera

• VNC

Basic Steps

1. Connect your robot. You can find the guide

2. Once your robot is connected, open vnc and run cvexample.py file in the terminal.

1. In a seperate terminal, run rqt.

1. In rqt window, click Plugning -> Dynamic Reconfigure

2. Click cvexample and the hsv slides should pop up.

3. Adjust the sliders to find the hsv values for your desired colors.

In a seperate terminal, run rqt_image_view to get a larger frame of the camera image. This is optional.