Scale image from corner

Am animating (scaling) an imagen like:

var zoomScale = false;
imagenNota.addEventListener('doubletap', function(e) {
        var t = Titanium.UI.create2DMatrix();
        if (!zoomScale){    
            t = t.scale(2.0);
            $.viewContenidoFoto.animate({
                transform:t,
                right: 10,
                bottom: 100,
                duration:500
            });
            zoomScale = true; 
        }else{
            $.viewContenidoFoto.animate({
                transform:t,
                duration:500
            });
            zoomScale = false;
        }
    });

But, I need to scale the image from its right/bottom corner. Something Like:

Considering the image initially has a margin 5 from right and 5 from its bottom, how can animate and anchor the image to its right and to its bottom?