It uses mathematical properties of the images to make the match, and sometimes ends up serendipitously picking other images from the same location (because two photographs of, say, the Taj Mahal taken on a sunny mid-afternoon are likely to share similar properties).![]()
Of course, it is possible to use such a tool creatively, replacing unwanted parts of an image with elements from a completely different scene, as the paper (PDF here shows:
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