1. A method for selecting a representative region of interest for an input image, the method comprising: receiving an input image; dividing the input image into a plurality of regions; identifying one or more of the plurality of regions on which to perform a local analysis; performing the local analysis on each of the one or more identified regions; and selecting one of the one or more identified regions as a representative region based on results of the local analysis; wherein the selecting one of the one or more identified regions as the representative region comprises: for each of the one or more identified regions: fitting a Gaussian curve to a histogram of pixel intensity values of the region, determining whether a first percentage of all of the pixel intensity values in the region is accounted for in the histogram, determining whether a second percentage of all of the pixel intensity values in the region is below or within the Gaussian curve in the histogram, determining whether a third percentage of all of the pixel intensity values in the region is outside the Gaussian curve in the histogram; assigning a quality score to each of the one or more identified regions; and selecting one region as the representative region based on the quality scores.