Methods and apparatus to detect differences between images

摘要

Methods and apparatus to detect differences between images are disclosed. Example methods disclosed herein to recognize different image versions include generating a first signature representative of a sample image, and obtaining a reference image associated with a second signature determined to substantially match the first image signature. Such example methods also include generating a third signature representative of a first region of the sample image corresponding spatially to a first region of the reference image associated with a first version of the reference image, the third signature being different from the first signature. Such example methods further include comparing the generated third signature and a fourth signature representative of the first region of the reference image to determine whether the sample image corresponds to the first version of the reference image.

主权项

1. A method to recognize different image versions, the method comprising:
accessing, with a processor, information associated with a reference image represented by a reference signature determined to match a first signature representative of a first image, the reference image having different possible versions; generating, with the processor, a third signature representative of a first region of the first image corresponding spatially to a first region of the reference image that depicts different content for different versions of the reference image, the third signature being different from the first signature; and comparing, with the processor, the third signature and a fourth signature representative of the first region in a first version of the reference image to determine whether the first image corresponds to the first version of the reference image.