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# Detect the RGB color from a webcam using Python – OpenCV

• Last Updated : 02 Sep, 2020

Prerequisites: Python NumPy, Python OpenCV

Every image is represented by 3 colors that are Red, Green and Blue. Let us see how to find the most dominant color captured by the webcam using Python.

Approach:

1. Import the cv2 and NumPy modules
2. Capture the webcam video using the cv2.VideoCapture(0) method.
3. Display the current frame using the cv2.imshow() method.
4. Run a while loop and take the current frame using the read() method.
5. Take the red, blue and green elements and store them in a list.
6. Compute the average of each list.
7. Whichever average has the greatest value, display that color.

## Python3

 `# importing required libraries``import` `cv2``import` `numpy as np`` ` `# taking the input from webcam``vid ``=` `cv2.VideoCapture(``0``)`` ` `# running while loop just to make sure that``# our program keep running untill we stop it``while` `True``:`` ` `    ``# capturing the current frame``    ``_, frame ``=` `vid.read()`` ` `    ``# displaying the current frame``    ``cv2.imshow(``"frame"``, frame) `` ` `    ``# setting values for base colors``    ``b ``=` `frame[:, :, :``1``]``    ``g ``=` `frame[:, :, ``1``:``2``]``    ``r ``=` `frame[:, :, ``2``:]`` ` `    ``# computing the mean``    ``b_mean ``=` `np.mean(b)``    ``g_mean ``=` `np.mean(g)``    ``r_mean ``=` `np.mean(r)`` ` `    ``# displaying the most prominent color``    ``if` `(b_mean > g_mean ``and` `b_mean > r_mean):``        ``print``(``"Blue"``)``    ``if` `(g_mean > r_mean ``and` `g_mean > b_mean):``        ``print``(``"Green"``)``    ``else``:``        ``print``(``"Red"``)`

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