Methods for unit loading device (ULD) localization are disclosed herein. An example method includes capturing a set of image data featuring the ULD. The example method further includes cropping the set of image data to generate a cropped image. The cropped image features a portion of the ULD. The example method further includes determining one or more candidate edges of the portion of the ULD within the cropped image. The example method further includes identifying one or more edges of the portion of the ULD from the one or more candidate edges, wherein each of the one or more edges represents a boundary of the portion of the ULD.