title: Finding exact hsv values for colors with green and purple in opencv
body: <p>I am tring to detect the plant with the colors of green and purple using opencv color detection. I have done it for the green color, but I am unable to get the exact lower range and upper range of the color green + purple. The values I have used would detect all the colors in the image. Values:</p>
  
  <pre><code>lower_purple = np.array([[80, 10, 10]])
  upper_purple = np.array([120, 255, 255])
  </code></pre>
  
  <p>How can I get the exact hsv range of the values for each color.</p>