Android Question Pan Zoom with relative marking on image - PinchZoomAndMove

I am looking for some suggestions on how I can achieve the following:

Load an image and when touched a mark appears on it at X/Y. This has been done but I also need to pan and zoom the image. When zoomed (either + or -) I need to touch for X/Y to be relative to the change of image size.

I have played with the PinchZoomAndMove example (very good example) and would welcome any suggestions of methods to achieve this. Thanks in advance.