4.x
Add Java and Python code for the following imgproc tutorials: Finding contours in your image, Convex Hull, Creating Bounding boxes and circles for contours, Creating Bounding rotated boxes and ellipses for contours, Image Moments, Point Polygon Test.
Merge pull request #12246 from sturkmen72:move_enums
Merge pull request #12206 from jsxyhelu/3.4