this post was submitted on 13 Apr 2025
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    Converting an image to PNG alignment chart (lemmy.dbzer0.com)
    submitted 1 week ago by sunglocto@lemmy.dbzer0.com to c/linuxmemes@lemmy.world
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    [–] communism@lemmy.ml 18 points 1 week ago (2 children)

    That's not on the chart because it doesn't convert it. It only renames it. A JPEG ending with .png is still a JPEG

    [–] x00z@lemmy.world 32 points 1 week ago

    That's what the mimetype cult wants you to believe.

    [–] blind3rdeye@lemm.ee 4 points 1 week ago (1 children)

    One could argue that they have converted it, but it was done poorly.

    In a similar sense, the screenshots and phone photos are not conversions. They are entirely new images.

    [–] communism@lemmy.ml 2 points 1 week ago* (last edited 1 week ago)

    I would say that's not comparable. One process (screenshotting or taking a photo as PNG) results in a PNG as the output. The other process results in an image of the same format as the output. I guess at best you could make a philosophical argument as to what is ontologically a PNG: is it something that ends in .png, or is it a file that follows the PNG format? I think most people would say the latter, so if we say the definition of something is just a description of how it's used, then the former process results in a PNG and the latter process does not.

    Also, how is screenshotting an "entirely new image" in a way that e.g. putting it into GIMP and exporting to PNG isn't? That's doing the same thing. You know there isn't some "canonical" JPEG to PNG algorithm, right?