> For the complete documentation index, see [llms.txt](https://campus-rover.gitbook.io/lab-notebook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://campus-rover.gitbook.io/lab-notebook/fiiva/hsv_values_finder.md).

# 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 [here](https://campus-rover.gitbook.io/lab-notebook/bru/connect-to-robot)
2. Once your robot is connected, open vnc and run cvexample.py file in the terminal.

```bash
rosrun prrexamples cvexample.py
```

3. In a seperate terminal, run rqt.

```bash
rqt
```

![RQT](/files/VHbLLIIHAegnYx4sSUjA)

4. In rqt window, click Plugning -> Dynamic Reconfigure
5. Click cvexample and the hsv slides should pop up.
6. 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.

```bash
rqt_image_view
```

![RQT](/files/uXQPqTrSNyJ0CTHIerlI)


---

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