Thumbnail optimization question…

  • Resolved WPWanderer

    (@wpwanderer)


    9 years, 10 months ago

    Maybe I am thinking about this incorrectly as image optimization has perplexed me in the past and I may be over thinking this. I have a question about thumbnails and how they are optimized in ewww.

    Let us say I upload an image (with ewww activated) that according to Photoshop has a resolution of 256 pixels/inch.

    I look at the optimized image in PS again and I see that it now says 72 pixels/inch. This is what I was expecting/wanting.

    However, I look at all the thumbnails and they are all still at 256 pixels/inch . For this theme there are some 1600px in width thumbs. So, not little.

    Does this plugin compress thumbs or am I thinking about this wrong? Also, I haven’t messed with the settings. I left them as is as I am testing.

    https://ww.wp.xz.cn/plugins/ewww-image-optimizer/

Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Author Shane Bishop

    (@nosilver4u)

    9 years, 10 months ago

    Yeah, you’re confusing DPI (dots/pixels per inch) with resolution. DPI is a ratio of the pixels that fit in an inch, the other is simply a measurement of the total pixels in an image. The DPI is irrelevant for screens, and is only useful for printing (where you want much higher than 72 dpi). What you need to concern yourself with regarding image optimization is the resolution of the image as displayed, compared to the actual resolution of the image.
    So if your images are 256×256, and you’re displaying them on the page at that size, everything is awesome, and then you just need EWWW to re-compress the image to minimize the file size. If your images are 1600×1600 and you’re displaying them at 256×256 (or less), then you need to do one of two things:

    1. Resize your image to 256×256
    2. register a new (re)size with something like the Simple Image Sizes plugin

    WordPress generates several sizes by default, but you can add your own or change the dimension to fit what your pages are displaying. You can see the default sizes on Settings->Media

    Thread Starter WPWanderer

    (@wpwanderer)

    9 years, 9 months ago

    Thanks for your thorough answer. I continued to research my confusion on Stack. I have learned that I am overly fixated on 72 ppi or dpi or what have you. LOL. However, I don’t think I am alone in my confusion. Thanks, again.

    Plugin Author Shane Bishop

    (@nosilver4u)

    9 years, 9 months ago

    You definitely are not alone, as it is not the first time I’ve had that question, and it probably won’t be the last 🙂

Viewing 3 replies - 1 through 3 (of 3 total)

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