1. A dimensioning system, comprising: an imager configured to acquire images; a user input/output system configured to display images and to receive user input; and a processor configured to: identify representations of three-dimensional objects in the acquired images; initially select one of the identified objects; display the acquired images and an indication indicative of the initially selected one object via the user input/output system; receive a first indication of at least one user input via the user input/output system, the first indication of the at least one user input comprising an indication of a user-selected object to override the selection by the processor of the initially selected one object, the user-selected object being an object other than the initially selected one object, or a second indication of at least one user input via the user input/output system, the second indication of the at least one user input comprising an indication confirming the selection by the processor of the initially selected one object; and computationally determine dimensional weight data for the user-selected object if the processor receives the first indication of the at least one user input via the user input/output system comprising an indication of the user-selected object, or the initially selected one object if the processor receives the second indication of the at least one user input comprising an indication confirming the selection by the processor.