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2. Wikipedia:Preparing images for upload - Wikipedia

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

   optipng -o7 file.png advdef -z4 file.png pngout /ks file.png deflopt file.png Each of these utilities uses a different, more sophisticated "deflate" compression method variant on the PNG and generally produces a smaller file when run after the other tools. If the smallest result matters, try some experimenting to see what produces the best result.

3. Apple Icon Image format - Wikipedia

   en.wikipedia.org/wiki/Apple_Icon_Image_format

   The Apple Icon Image format (.icns) is an icon format used in Apple Inc.'s macOS.It supports icons of 16 × 16, 32 × 32, 48 × 48, 128 × 128, 256 × 256, 512 × 512 points at 1x and 2x scale, with both 1-and 8-bit alpha channels and multiple image states (example: open and closed folders).

4. PNG - Wikipedia

   en.wikipedia.org/wiki/PNG

   A PNG file contains a single image in an extensible structure of chunks, encoding the basic pixels and other information such as textual comments and integrity checks documented in RFC 2083. [7] PNG files have the ".png" file extension and the "image/png" MIME media type. [8]

5. Image file format - Wikipedia

   en.wikipedia.org/wiki/Image_file_format

   The size of raster image files is positively correlated with the number of pixels in the image and the color depth (bits per pixel). Images can be compressed in various ways, however. A compression algorithm stores either an exact representation or an approximation of the original image in a smaller number of bytes that can be expanded back to ...

6. Wikipedia:Extended image syntax - Wikipedia

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

   Alternatively, and only where absolutely necessary, users' preferences may be disregarded and the size of the image fixed by specifying a size in pixels: Width px or x Height px or Width x Height px. Scale the image to be no greater than the given width or height, keeping its aspect ratio.

7. Comparison of graphics file formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_graphics...

   .png image/png General purpose Yes PNM: Portable Anymap File Format ASCII.pnm image/x-portable-anymap Yes PostScript: page description/scripting language, levels 1–3 Adobe.ps, .ps2, .ps3 printing/publishing industry standard format PPM: Portable Pixmap File Format ASCII.ppm image/x-portable-pixmap Very easy to understand.

8. ICO (file format) - Wikipedia

   en.wikipedia.org/wiki/ICO_(file_format)

   The Shell Icon Size value allows using larger icons in place of 32×32 icons and the Shell Small Icon Size value allows using custom sizes in place of 16×16 icons. [3] Thus, a single icon file could store images of any size from 1×1 pixel up to 256×256 pixels (including non-square sizes) with 2 (rarely used), 16, 256, 65535, or 16.7 million ...

9. Template:Infobox convention center - Wikipedia

   en.wikipedia.org/wiki/Template:Infobox...

   Infobox for a convention center Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status Name name The name of the convention center in English. String suggested Logo logo The logo of the convention center File suggested Logo Size logo_size The logo width in pixels, i.e., 175 (defaults to 250 if not specified). Number ...