I noticed some weird look in the photos of my latest post: artifacts and some color shit from compression, a strange vertical banding. This is more noticeable in foggy shots, which this as some.
Seems like some aggressive compression or come conversion error. Does anyone what kind of processing uploaded photos have?
My uploaded version:
Microblog version:
Oh yeah, this is a known problem, Micro.blog isn’t very kind to photos, unfortunately. 
The banding you describe is common, colors can get messed up, and the really weird part is that all this mangling usually makes the file size a lot bigger, like 3–4×. 
(A recent upload of mine was 210 kB, but it ended up 800 kB on my blog with worse quality.)
I know @manton is aware of this, see previous discussions here and here, and hopefully it’ll get fixed in the future.
Thanks! I did try to find something about that around here.
Any known workarounds? Sometimes these things affect more certain sizes and resolutions, and I have a feeling this happens more in the web client. Just uploaded the same via the app and there’s not the same color casting and banding.
A very empirical and non evidence based conclusion, but I think this has been happening more when I upload photos on the web browser, so I’ve prioritising the app for “serious” photo uploads.
Hehe, you’re not alone, that’s my gut feeling and workflow too. 
Thanks y’all, I’m reviewing this again to see if the compression settings need to be tweaked. Also if you are using Micro.blog Premium, I’m curious if the artifacts are also visible on the new “XL” version of the photos that we save? These are linked if you click on the photo from the Uploads page, for JPEGs.
The size I uploaded didn’t generate an XL image, but I can test it again with a higher resolution image.
I’ve deployed a change which makes it significantly less likely to have compression artifacts and banding. Looks way better. However, I believe there is still room for improvement on the color profile, as I still sometimes see shifts in brightness.
Would love to hear how it looks for real usage this week.
Tried with the same foggy photo, because I noticed in some photos is more noticeable than others, in the same post and done everything in the same way. The result seems clearly much better now, specially regarding that weird banding and color casts.
This is the actual image being served on the post: https://cdn.uploads.micro.blog/244722/2025/eac4ee4e0e.jpg
