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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...

    Making an image that was incorrectly saved as JPEG fit for saving as PNG. Suppose you have a map for an island that was inadvertently saved as JPEG. Looks OK, if a bit fuzzy. 1. In your bitmap graphics editor, set your fuzzy selection ("magic wand") tool so that it only will select pixels of exactly the same color. (Here: Threshold = 0) 2.

  3. 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] PNG was published as an informational RFC 2083 in March 1997 and as ...

  4. Transparency (graphic) - Wikipedia

    en.wikipedia.org/wiki/Transparency_(graphic)

    Transparency (graphic) GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats. The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.

  5. Image file format - Wikipedia

    en.wikipedia.org/wiki/Image_file_format

    Image file format. An image file format is a file format for a digital image. There are many formats that can be used, such as JPEG, PNG, and GIF. Most formats up until 2022 were for storing 2D images, not 3D ones. The data stored in an image file format may be compressed or uncompressed. If the data is compressed, it may be done so using lossy ...

  6. Category : Images that should have transparent backgrounds

    en.wikipedia.org/wiki/Category:Images_that...

    Big and Small logo.png 294 × 339; 30 KB. Bosnian-Herzegovinian Greens.png 458 × 218; 53 KB. Caxi aus a logo.jpeg 353 × 282; 17 KB. CGTP Peru logo.png 528 × 189; 56 KB. Charles Schwab Challenge logo.png 297 × 170; 14 KB. Chorley bs logo.png 267 × 139; 9 KB. Chung Chun Rice Dog logo.png 371 × 268; 91 KB.

  7. Alpha compositing - Wikipedia

    en.wikipedia.org/wiki/Alpha_compositing

    In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full transparency. [1] It is often useful to render picture elements (pixels) in separate passes or layers and then combine the resulting 2D images into a single, final image called the composite.

  8. Comparison of graphics file formats - Wikipedia

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

    image/png General purpose Yes PNM: Portable Anymap File Format ASCII ... RLE, JPEG, and PNG Raster 16 bpc Yes Yes No No No No No Yes No No BPG: HEVC, Lossy and lossless

  9. JPEG 2000 - Wikipedia

    en.wikipedia.org/wiki/JPEG_2000

    JPEG 2000 (JP2) is an image compression standard and coding system. It was developed from 1997 to 2000 by a Joint Photographic Experts Group committee chaired by Touradj Ebrahimi (later the JPEG president), with the intention of superseding their original JPEG standard (created in 1992), which is based on a discrete cosine transform (DCT), with a newly designed, wavelet-based method.

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