region of interest

Beginner Questions
1

In the ImageReadRegionOfInterestWrite.cxx example, where start[0]=atoi(argv[3]);start[1]=atoi(argv[4]);size[0]=atoi([argv[5]]);size [1]=atoi([argv[6]]) What should I fill in?

2

That depends on the size of the image you are providing, but you can try this: 10 30 200 150.