pixel location on an image using mouse click

I am wanting to use the mouse so that when I click the mouse button, it displays a small cross hair on an image (which is on an axes component). I then use the to perform a line scna of an image using those coordinates. I have tried ginput (but this gives a massive cross hair that covers the entire gui), as well as impixelinfo.

This is my attempt after searching.

Inside the GUI's OpeningFcn or the callback function for a button:
set(gcf, 'WindowButtonDownFcn', @getMousePositionOnImage);
set(src, 'Pointer', 'crosshair'); % Optional
pan off % Panning will interfere with this code

Then have a mouse callback function along the lines of:
function getMousePositionOnImage(src, event)

handles = guidata(src);

cursorPoint = get(handles.axesImage, 'CurrentPoint');
curX = cursorPoint(1,1);
curY = cursorPoint(1,2);

However, this only gives the current position within the axes and not the pixel location.

I assume that I just scale these values by the size of the image?

Thanks Jason

[Jason]

OK, it seems when you load an image, then this does the scaling automatically.