[email protected]'s profile - activity

Yes，I want to draw a picture and get its contours，save the contours to Database (such as SQL lite) or a file ,then draw another ，again and again

I am a beginner ，

I want to draw something and get its contours without writing it into a img file ，on the screen of a Android phone，

almost all examples show that getting contours using cvfindcontours from a jpeg file or png and so on，

if anyone can show me some codes about convent drawings to mat format ？ Thanks a lot.