How can I zoom in of an image without enlargining it?

Question

I've been looking at a few methods of zooming in on images and I've found some similiar versions of this Zoom in GeeksForGeeks. Now my question is whether the zoom could also be built without enlarging the whole image, just keeping the size and only zooming in. (For example half display height and complete display width and keeping this size).

And if this is possible what would be the right approach to scroll to the right/ left and top/ bottom of the picture if you are zoomed in (because the rest of the picture is cut off), so you can see the rest of the image. Can you use scrollview for this, or is it for other purposes?

Maybe someone has an idea.