1. A method of augmented reality interaction for repositioning a virtual object on an image of a surface, the method comprising: capturing successive video images of the surface and first and second control objects, the first and second control object being a user's hands, or respective parts of one or both of the user's hands; defining an interaction start area over the surface with respect to the virtual object; detecting the first and second control objects based upon skin tone pixels in successive video images; detecting whether the first and second control objects are brought together over the interaction start area; and when it is detected that the first and second control objects are brought together over the interaction start area, analysing a region of successive video images using optical flow analysis to determine an overall direction of motion of the first and second control objects; and augmenting the video image to show the virtual object being held by the first and second control objects; and in which the step of augmenting the video image to show the virtual object being held by the first and second control objects comprises the step of superposing a graphical effect on the video image prior to superposition of the virtual object, such that the graphical effect visually disconnects the virtual object from one or both of the user's hands in the resulting augmented image.