WordPress.org

Make WordPress Core

Opened 3 months ago

#53200 new defect (bug)

image quality reduction in smaller images

Reported by: digitalmountain Owned by:
Milestone: Awaiting Review Priority: normal
Severity: normal Version: 5.7.2
Component: Media Keywords: needs-patch
Focuses: Cc:

Description

So what happens is you upload a full size image to wordpress in my case project53.co.uk and I am using a goodlayers theme but I have repeated the same process on a stoc install on a different site and have the same issue.

On this site for example the easiest one to see it on is the woman and look at the cheeks as full size looks ok and has colour and smaller images looks toned down and grey and it is wordpress changing the image quality with the smaller images.

this is the details send from our dev guy

For now - I have removed the thumbnails that the site was trying to use (I had set it to 'full', which should have been used, but the theme didn't want to co-operate) and then regenerated the thumbnails - pretty much forcing the site to use the full-size image.

It may occur elsewhere in the site - hard to say until I've seen every possible variation of an image on the theme - but as long as we repeat the same steps to remove the thumbnail size and regenerate, it will be fine.

You could just remove all regenerated sizes and ensure that sizes are set by the container the image is in; that would definitely stop it.

So if you see another image (or multiple images) having the same problem:

Inspect that image and see what thumbnail size it is using. (You can generally tell by the suffix on the end of the image name, e.g. blahblah-800x600.jpg)

Go into Goodlayers Options > Miscellaneous > Thumbnail sizing Remove the thumbnail size that it's using

Go into Tools > Regenerate Thumbnails
Ensure that the thumbnail size that you remove is not there
Click Advanced Options, and check the box which says "Delete unselected thumbnails" - this will remove that size from the server and tell WordPress it doesn't exist

If it was me - I'd unregister all of the thumbnails and just limit the size of images which are being uploaded - and use that size globally throughout the theme (if the size doesn't exist it should fallback to the full size image as default).

That doesn't necessarily have to be the case - but you just don't want 5MB images on a page - because then you'll have all the page speed problems to deal with!

Change History (0)

Note: See TracTickets for help on using tickets.