Question

If we have 2 same images. One is small and one is big. Now we have x y value on small image

then how we will map it on the same position on big image. Can anyone tell me with formula?

Answer 1

I’d imagine you’d just scale it:

int bigX = smallX * (bigWidth / smallWidth);
int bigY = smallY * (bigHeight / smallHeight);

Note that you may wish to use floating point arithmetic to avoid integer arithmetic issues:

int bigX = (int) (smallX * ((double) bigWidth / smallWidth));
int bigY = (int) (smallY * ((double) bigHeight / smallHeight));