1. A method of locating one or more content portions of an image, the image including a plurality of pixel values, the method comprising automatically performing the following steps using a processor: determining a pixel threshold value using the pixel values so that the pixel threshold value corresponds to a background range of the pixel values; comparing the determined pixel threshold value to the pixel values so that a background set of the pixel values and a content set of the pixel values are determined; determining a plurality of boundaries between the background and content sets of pixel values; determining the one or more content portions using the determined boundaries; and determining respective bounding boxes for the determined one or more content portions.