I need to transform a certain area of an image to a rectangle. I know the 4 corner coordinates of the trapezium area.
For example, this is the original image:
The x and y coordinates of points A, B, C, D are KNOWN.
I want to get an image like this:
A'B'C'D' is a rectangle and the x and y coordinates of points A', B', C', D' are also KNOWN.
The pixel A should move to A',
The pixel B should move to B',
The pixel C should move to C',
The pixel D should move to D'.
And the whole trapezium area should be transformed.
I'm sorry for bad English, I hope I could explain my question properly.