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2. Gaussian blur - Wikipedia

   en.wikipedia.org/wiki/Gaussian_blur

   Gaussian blurring is commonly used when reducing the size of an image. When downsampling an image, it is common to apply a low-pass filter to the image prior to resampling. This is to ensure that spurious high-frequency information does not appear in the downsampled image . Gaussian blurs have nice properties, such as having no sharp edges, and ...

3. Unsharp masking - Wikipedia

   en.wikipedia.org/wiki/Unsharp_masking

   Source image (top), sharpened image (middle), highly sharpened image (bottom) The same differencing principle is used in the unsharp-masking tool in many digital-imaging software packages, such as Adobe Photoshop and GIMP. [1] The software applies a Gaussian blur to a copy of the original image and then compares it to the original. If the ...

4. Chromatic aberration - Wikipedia

   en.wikipedia.org/wiki/Chromatic_aberration

   Chromatic aberration also affects black-and-white photography. Although there are no colors in the photograph, chromatic aberration will blur the image. It can be reduced by using a narrow-band color filter, or by converting a single color channel to black and white. This will, however, require longer exposure (and change the resulting image).

5. Kernel (image processing) - Wikipedia

   en.wikipedia.org/wiki/Kernel_(image_processing)

   In image processing, a kernel, convolution matrix, or mask is a small matrix used for blurring, sharpening, embossing, edge detection, and more.This is accomplished by doing a convolution between the kernel and an image.

6. Adobe Photoshop - Wikipedia

   en.wikipedia.org/wiki/Adobe_Photoshop

   Adobe Photoshop is a raster graphics editor developed and published by Adobe for Windows and macOS.It was created in 1987 by Thomas and John Knoll.It is the most used tool for professional digital art, especially in raster graphics editing, and its name has become genericised as a verb (e.g. "to photoshop an image", "photoshopping", and "photoshop contest") [7] although Adobe disapproves of ...

7. Adobe Creative Suite - Wikipedia

   en.wikipedia.org/wiki/Adobe_Creative_Suite

   Adobe Creative Suite (CS) is a discontinued software suite of graphic design, video editing, and web development applications developed by Adobe Systems.. The last of the Creative Suite versions, Adobe Creative Suite 6 (CS6), was launched at a release event on April 23, 2012, and released on May 7, 2012. [1]