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  2. Image subtraction - Wikipedia

    en.wikipedia.org/wiki/Image_subtraction

    Thus, image processing algorithms can make the fixed stars in the background disappear, leaving only the target. [2] Distinct families of astronomical image subtraction techniques have emerged, operating in both image space [ 3 ] [ 4 ] or frequency space, [ 5 ] [ 6 ] with distinct trade-offs in both quality of subtraction and computational cost.

  3. Spot the difference - Wikipedia

    en.wikipedia.org/wiki/Spot_the_difference

    Solving "Spot the difference" by overlaying the left image (top left) with an inverse image (bottom left) of the right one (top right). Differences appear as non grey parts (bottom right) A way to solve a spot the difference puzzle digitally is to create a inverse version of one of the images to compare and to overlay it 50% on the other one.

  4. Wikipedia:Ten things you may not know about images on ...

    en.wikipedia.org/wiki/Wikipedia:Ten_things_you...

    Also, most images found on the web do not meet our non-free content policy, which states that a non-free image may be used only when it cannot be replaced. For example, there's no way that a logo of a political party or a screenshot of a video game can be replaced by a free image, but a photo of a living person or location can almost always be ...

  5. Sum of absolute differences - Wikipedia

    en.wikipedia.org/wiki/Sum_of_absolute_differences

    There are exactly three unique locations within the search image where the template may fit: the left side of the image, the center of the image, and the right side of the image. To calculate the SAD values, the absolute value of the difference between each corresponding pair of pixels is used: the difference between 2 and 2 is 0, 4 and 1 is 3 ...

  6. The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.

  7. Presentation - Wikipedia

    en.wikipedia.org/wiki/Presentation

    Content such as text, images, links, and effects are added into each of the presentation programs to deliver useful, consolidated information to a group. Visual elements add to the effectiveness of a presentation and help emphasize the key points being made through the use of type, color, images/videos, graphs, layout, and transitions.

  8. From Absolutely Adorable To Downright Hilarious, Here Are 35 ...

    www.aol.com/35-adorable-meaningful-simple...

    Image credits: SilverCityStreet #2 I once got a bag of Hershey's kisses, carefully unwrapped and removed all the flags, and then replaced the flags with tiny slips of paper on which I had written ...

  9. Five-point stencil - Wikipedia

    en.wikipedia.org/wiki/Five-point_stencil

    In numerical analysis, given a square grid in one or two dimensions, the five-point stencil of a point in the grid is a stencil made up of the point itself together with its four "neighbors". It is used to write finite difference approximations to derivatives at grid points. It is an example for numerical differentiation.