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2. Help : How to reduce colors for saving a JPEG as PNG

   en.wikipedia.org/wiki/Help:How_to_reduce_colors...

   Sometimes, you find a drawing or similar image useful for a Wikipedia article, that was saved as a JPEG but should have been saved as a PNG.JPEG is good for images where the color changes fluidly throughout the image, like in a photograph, whereas PNG files are good for images with relatively few colors, such as a drawing of a flag, a chart, or a map; note that sometimes SVG is better.

3. pngcrush - Wikipedia

   en.wikipedia.org/wiki/Pngcrush

   pngcrush is a free and open-source command-line utility for optimizing PNG image files. It reduces the size of the file losslessly – that is, the resulting "crushed" image will have the same quality as the source image.

4. Comparison gallery of image scaling algorithms - Wikipedia

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

   An adaptable technique which can deliver variable amounts of detail or smoothness. It aims to preserve the shape and coordinates of original details, without blurring those details into neighboring ones. It will avoid blending pixels which directly touch each other, and instead only blend pixels with their diagonal neighbors.

5. Price cut wars: Walgreens follows Target, Walmart and Amazon ...

   www.aol.com/price-cut-wars-walgreens-follows...

   Walgreens, which operates nearly 9,000 locations across the US, has been cutting prices since October Price cut wars: Walgreens follows Target, Walmart and Amazon in slashing prices on 1,500 items ...

6. Walgreens is cutting prices on 1,500 items, joining Target ...

   www.aol.com/walgreens-cutting-prices-1-500...

   Walgreens is joining other retailers in cutting prices across the board, from snacks to toiletries and even Squishmallows, in an effort to lure back inflation-weary shoppers turned off by high prices.

7. 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.