message: Fix np row,column to cv y,x
  This explanation was created to avoid confusion, but it seems like the author was confused :D
diff: @@ -78,7 +78,7 @@ pixelpoints = np.transpose(np.nonzero(mask))
  Here, two methods, one using Numpy functions, next one using OpenCV function (last commented line)
  are given to do the same. Results are also same, but with a slight difference. Numpy gives
  coordinates in **(row, column)** format, while OpenCV gives coordinates in **(x,y)** format. So
  -basically the answers will be interchanged. Note that, **row = x** and **column = y**.
  +basically the answers will be interchanged. Note that, **row = y** and **column = x**.
  7. Maximum Value, Minimum Value and their locations
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