# Stopper Detection #
1. Load Image
2. Compute Stopper Center
1. Filter Image by HSV
2. Find contour
1. Convert to grayscale image
2. Canny
3. find Contours

- Mouse Release:
- Initial: get ROI of stoppers
- Second release: comput HSV value
- Compute HSV from Img with crop_img
- Return Vec3b HSV value
- SetHSVColor
- FilterImgByHsv
- ComputeStopperCenter