1. A method of determining the impact of objects referenced or rendered by an application executing on a computing device, comprising: (a) intercepting a function call to a graphics or audio application programming interface (API) issued by the application, wherein said interception is performed by an interception component installed on the computing device that is not part of the application or said graphics or audio API; (b) determining if an object referenced or rendered by said intercepted function call is an object to be tracked, wherein said determining is performed by an object measurement component installed on the computing device that is not part of the application or said graphics or audio API; and (c) collecting attribute information relating to display or playback of said object on the computing device if said object is determined to be an object to be tracked, wherein said collecting is performed by said object measurement component.