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2. Comparison gallery of image scaling algorithms - Wikipedia

   en.wikipedia.org/wiki/Comparison_gallery_of...

   One of the simpler ways of increasing the size, replacing every pixel with a number of pixels of the same color. The resulting image is larger than the original, and preserves all the original detail, but has (possibly undesirable) jaggedness. The diagonal lines of the "W", for example, now show the "stairway" shape characteristic of nearest ...

3. Wikipedia : Featured picture criteria/Image size

   en.wikipedia.org/.../Image_size

   Size in kB varies with image content and JPEG compression and generally bears little relation to pixel dimensions. In general, it's a good idea to crop a photograph to highlight the relevant subject. Bear in mind that, after cropping, an image must be a minimum of 1500 pixels along its shortest edge to be considered for featured picture promotion.

4. File:Resolution chart.svg - Wikipedia

   en.wikipedia.org/wiki/File:Resolution_chart.svg

   This table illustrates total horizontal and vertical detail via box size. It does not accurately reflect the screen shape (aspect ratio) of these formats, which is always stretched or squeezed to 4:3 or 16:9. Note that this chart illustrates visible resolution, not pixel count, which is why the 1080i box is not as tall as the 1080p box.

5. Image scaling - Wikipedia

   en.wikipedia.org/wiki/Image_scaling

   Image scaling can be interpreted as a form of image resampling or image reconstruction from the view of the Nyquist sampling theorem.According to the theorem, downsampling to a smaller image from a higher-resolution original can only be carried out after applying a suitable 2D anti-aliasing filter to prevent aliasing artifacts.

6. Wikipedia:Non-free content/Image size calculator - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Non-free_content/...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

7. Photopea - Wikipedia

   en.wikipedia.org/wiki/Photopea

   Photopea (/ ˈ f oʊ t ə ˈ p iː / FOH-tə-PEE) is a web-based photo and graphics editor developed by Ivan Kutskir. It is used for image editing, making illustrations, web design or converting between different image formats. Photopea is free advertising-supported software, and offers a premium ad-free subscription