message: Spell correction
  Corrected the spelling which was used in explanation for parameters.
diff: @@ -66,7 +66,7 @@ Explanation
  - *min_dist = gray.rows/16*: Minimum distance between detected centers.
  - *param_1 = 200*: Upper threshold for the internal Canny edge detector.
  - *param_2* = 100\*: Threshold for center detection.
  - - *min_radius = 0*: Minimum radio to be detected. If unknown, put zero as default.
  + - *min_radius = 0*: Minimum radius to be detected. If unknown, put zero as default.
  - *max_radius = 0*: Maximum radius to be detected. If unknown, put zero as default.
  -# Draw the detected circles:
  