How can I remove big rectangle , which contains small rectangle?

I want to remove the rectangles, which contain small rectangles with specific sizes. The big rectangle marked by arrow..

[Rik]

What have you tried so far? Have you figured out a method to do this in pseudocode?

[K M Ibrahim Khalilullah]

Thanks for your comment. if a big rectangle contains some small rectangles, I just remove the big rectangle. I have only the rectangle (x,y,w,h)

[KSSV]

First place...how you got those rectangles? This helps us in giving solution to the roots.

[Akira Agata]

If (x,y,w,h) values for each rectangles are available, this task would be much easier. Can we use these values ?

[K M Ibrahim Khalilullah]

Thanks to all. already solved