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  2. Image subtraction - Wikipedia

    en.wikipedia.org/wiki/Image_subtraction

    Nevertheless, in astronomical imaging, significant 'residuals' remain around bright, complex sources, necessitating further algorithmic steps to identify candidates (known as real-bogus classification) The Hutchinson metric can be used to "measure of the discrepancy between two images for use in fractal image processing". [9] [10]

  3. Visual comparison - Wikipedia

    en.wikipedia.org/wiki/Visual_comparison

    A visual diff or vdiff finds differences between two files by eyeball search.The term optical diff has also been reported, and is sometimes more specifically used for the act of superimposing two nearly identical printouts on one another and holding them up to a light to spot differences.

  4. Spot the difference - Wikipedia

    en.wikipedia.org/wiki/Spot_the_difference

    Spot the difference games are found in various media including activity books for children, newspapers, and video games.They are a type of puzzle where players must find a set number of differences between two otherwise similar images, whether they are illustrations or photographs that have been altered with photo manipulation.

  5. Can You Spot the Difference in These 20 Pictures? - AOL

    www.aol.com/spot-difference-20-pictures...

    Get your eyes ready—these are pretty tricky. The post Can You Spot the Difference in These 20 Pictures? appeared first on Reader's Digest.

  6. Sum of absolute differences - Wikipedia

    en.wikipedia.org/wiki/Sum_of_absolute_differences

    These differences are summed to create a simple metric of block similarity, the L 1 norm of the difference image or Manhattan distance between two image blocks. The sum of absolute differences may be used for a variety of purposes, such as object recognition, the generation of disparity maps for stereo images, and motion estimation for video ...

  7. Structural similarity index measure - Wikipedia

    en.wikipedia.org/wiki/Structural_similarity...

    The structural similarity index measure (SSIM) is a method for predicting the perceived quality of digital television and cinematic pictures, as well as other kinds of digital images and videos. It is also used for measuring the similarity between two images.

  8. Image registration - Wikipedia

    en.wikipedia.org/wiki/Image_registration

    Additionally, the phase correlation uses the fast Fourier transform to compute the cross-correlation between the two images, generally resulting in large performance gains. The method can be extended to determine rotation and scaling differences between two images by first converting the images to log-polar coordinates .

  9. Photos (Windows) - Wikipedia

    en.wikipedia.org/wiki/Photos_(Windows)

    Photos is a single-instance app that can organize digital photos in its gallery into albums. The default view is Collection, which is sorted by date. Users can also view items by Album or Folder. The album view shows both auto-generated and user-generated albums. The folder view displays files based on their location in the file system or on ...