after change codes i draw this shape only width line and circle
now i can calibrate field by 4 clicks on 4 red circle on the drawn shape and then 4 clicks on real world image as same , then i can use homography for calbration (manually ) , it is very precise , but this is start of my work , i dont know what changes need to do it automatically , (without need to click on real image) , thanks again for your help