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[resolved] Over-compressed images through Photon (5 posts)

  1. David Burkhart
    Member
    Posted 1 year ago #

    I'd like to make use of the Photon feature. It seems to work fine. But, it compresses photographs entirely too much.

    Can this feature be used without re-compressing images?

    https://wordpress.org/plugins/jetpack/

  2. designsimply
    Member
    Plugin Contributor

    Posted 1 year ago #

    It's part of the Photon's core design to compress the images and make them faster to load. If you want to serve full sized images without compressing them, a paid CDN service might work better for you.

  3. David Burkhart
    Member
    Posted 1 year ago #

    Miss Bigelow: Are you sure? The feature overview only mentions an alternative source for serving the images - nothing about compression. And, no, I don't need to serve large or lossless quality images. I'm just looking to tweak overall website speed, but without website images becoming so unacceptably ugly.

    After a little testing, the problem appears to be an incompatibility between Photon and a plugin, Meta Slider. Whenever I activate Photon, only the images within the slider become over-compressed. The rest of the images on the site look untouched.

    I went further in my testing to compare original images to those that were being served through Photon (at least the ones that did not look over-compressed). They are not being compressed at all. This finding seems a bit more consistent with Photon's overview which has no mention of compression.

  4. designsimply
    Member
    Plugin Contributor

    Posted 1 year ago #

    Here's the best description of Photon: http://developer.wordpress.com/docs/photon/ As you can see, compression is listed as a feature there.

    After a little testing, the problem appears to be an incompatibility between Photon and a plugin, Meta Slider. Whenever I activate Photon, only the images within the slider become over-compressed. The rest of the images on the site look untouched.

    Sounds like Meta Slider might be doing something funny to the image size settings just in the slider?

  5. David Burkhart
    Member
    Posted 1 year ago #

    Miss Bigelow: Photon does appear to more appropriately re-compress images only as needed. I am so used to optimizing them before uploading, that the other images had no need of further compression. So, that may explain why Photon left the other images alone.

    Your theory about a non-conventional use of DOM sizes by Meta Slider seems like a great guess. The poor slider images do appear to be quite fuzzy, as if their resolution were reduced and then increased before having the resulting pixelation smoothed over. However, artifacts created around heavily contrasted areas of each image suggest over-compression contributed. Still, given the theory of side effects from improper size techniques, Meta Slider could be tripping over itself and re-compressing the images all on its own.

    Given that Jetpack is worlds more valuable than any particular slider plugin, it's no guess as to which plugin I have decided to do without - at least until the apparent conflict is resolved.

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