1. A method for providing measurement data of a region of interest in an image in a graphical user interface (GUI) environment, the method comprising: locating a pair of edges in first and second dimensions of the region of interest selected by a user in a pixel field presented in the GUI; calculating a center position between respective edges in the first and second dimensions; repeating the locating and calculating until a convergence or divergence is determined; computing the measurement data based on a final center position relative to edges associated with the final center position in an event convergence is determined; and reporting the measurement data in the event convergence is detected or reporting a failure state in an event divergence is detected.