1. A method of identifying a subject and a distractor in a target image, said method comprising: receiving at least one reference image comprising image content corresponding to image content of the target image; determining a first saliency map for the target image, said first saliency map defining a distribution of visual attraction values identifying salient regions within the target image; determining a second saliency map for the reference image, said second saliency map defining a distribution of visual attraction values identifying salient regions within the reference image; comparing image content in at least one salient region identified in the first saliency map with image content of at least one salient region identified in the second saliency map; and identifying the subject and the distractor in the target image based on the comparison, wherein the subject is identified by a salient region of the target image sharing image content with at least one salient region of the reference image, and wherein the distractor is identified based on at least one remaining salient region of the target image.