I'm following a line with the LEGO EV3 Color Sensor in Reflected-light mode, I need to stop the robot when it detects a green tile in the ground, but I didn't succeeded in differentiating Green and Black, can I access the RGB values of the sensor, or in some way differentiate those colors?
Green does tend to be tricky on the LEGO EV3 Color sensor. Example
Here are some suggestions:
- Build a shroud to eliminate ambient light. I have seen people use electrical tape for this or build something from LEGO parts.
- Using the raw RGB values, convert to HSV (there is a link in Example 1 for this).
- Use the algorithm for the NXT color sensor from the EV3 source code. It will probably have to be adjusted a bit for differences in the sensors.