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Publishing Guidelines: Upload File Size and Pixel Dimensions


1 reply to this topic

#1 Andrea B.

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Posted 16 April 2015 - 16:01

Update: 06 Nov 2019: clarifications
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There is no setting in the forum software which can limit the megabyte size of an uploaded file. However, we can set a limit on the pixel dimensions of the displayed photo. Currently this is not set because the forum software will automatically resize pixel dimensions for best display within the page. For best display of your photo, please read the following carefully as there are good reasons for you to voluntarily limit both file size and pixel dimensions using your own software prior to uploading.


SUGGESTED DIMENSIONS

Save your JPG images at
  • Maximum dimensions between 800-1200 pixels wide for best page display.
  • Maximum 50% - 80% JPG quality for smaller file size and faster loading.
    The demo below shows that a lower JPG quality does not affect the quality of your displayed photo within this forum software.
Thank you!
  • If the photo file megabyte size is large, then it will slow down the loading of the topic or photo from the server. We don't pay for storage space, but we do pay for shared server CPU usage.
  • If the photo file has large pixel dimensions, then the forum software will resize it for you.
    Note that this is not always a bad thing as the forum software does a reasonably good job of resizing.
  • Practice with your own photo app to determine which combination of pixel dimension and JPG quality works best for your photo.
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Example of JPG Quality: 25%, 50%, 75%, 100%

Here's an example to show that saving at a JPG quality under 100% does not damage the presentation of your images. I've picked a nice UV foto of an African Violet from which I'll take an unresized extract to save at 25%, 50%, 75% and 100% JPG quality using Capture NX2.

African Violet in UV
This is the edited, finished photo resized before posting to an 800 pixel width.
Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676pnPf_800px.jpg

African Violet Conical Cells :: 204Kb :: 100% JPG quality :: unresized 330x330px extract
Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext100q.jpg

African Violet Conical Cells :: 149Kb :: 75% JPG quality :: unresized 330x330px extract
Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext75q.jpg

African Violet Conical Cells :: 107Kb :: 50% JPG quality :: unresized 330x330px extract
Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext50q.jpg

African Violet Conical Cells :: 73Kb :: 25% JPG quality :: unresized 330x330px extract
Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext25q.jpg


Let's look at those extracts in an unlabeled, mixed 4x4 block.
Expand your browser to permit a 660 pixel wide display so that you can see the block of 4.
Do not hover your cursor over the block until you've decided which looks best and which looks worst !!

Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext75q.jpgAttached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext25q.jpg
Attached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext50q.jpgAttached Image: saintpauliaSpUVBaadSB14_20150213wf_29676_ext100q.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 7,456 posts
  • Location: USA

Posted 06 November 2019 - 19:18

Update: 06 Nov 2019: clarifications
Andrea G. Blum
Often found hanging out with flowers & bees.