Comment by I_AM_STILL_A_IDIOT on 21/06/2016 at 16:24 UTC*

650 upvotes, 16 direct replies (showing 16)

View submission: Image Hosting on Reddit

Well, I'd like to give some feedback.

*What's up with the color fidelity and compression?**

From this submission I made about a photo I took in Japan[1]: the original[2], and the compressed rehost used for the thumbnail[3]. Notice the way dialed down yellow, for instance.

1: https://www.reddit.com/r/pics/comments/4mq25f/i_took_a_picture_of_a_quiet_street_at_night_in/

2: https://c1.staticflickr.com/1/628/20975913259_25518948e3_k.jpg

3: https://i.redditmedia.com/Q0MHUGPgRFeV1I4tvdpwpBLiN2Z47bo4cvdy1DgFcRU.jpg?w=508&s=9a5c5917550179d33113dfd9a777b9a9

By the way, I never permitted that rehost when submitting a flickr image to /r/pics. I'm not annoyed that it was rehosted, I'd just like there to be a heads up when that happens. And I'd prefer for the color fidelity to be at least somewhat more similar.

Beyond that, thanks for the image hosting service. It's neat to see that the hosting will be done at reddit instead of the typical imgur. Their pushing the imgur app to mobile users has been quite annoying.

--------------------------------------------------------------------------------

edit: for those interested: here's the full size, uncompressed image[4] (direct link[5]) - Flickr does a great job of hosting images at full resolution but can be a bit annoying to navigate.

4: https://www.flickr.com/photos/noaceulemans/20975913259/

5: https://c1.staticflickr.com/1/628/20975913259_19f54d167b_o.jpg

Replies

Comment by umbrae at 21/06/2016 at 16:36 UTC

448 upvotes, 7 direct replies

Wow, I haven't seen that sort of reduction in quality before. This is an image preview though, not an upload, so it is a different system. I'd be curious if you see this loss in quality if you made a direct upload to reddit. It may be something to do with a high quality jpeg not being expected on resize and losing some jpeg-specific data.

We'll definitely take a look at that though, thanks for letting us know.

Comment by MiamiZ at 21/06/2016 at 18:37 UTC

475 upvotes, 8 direct replies

Thanks for the feedback! I just pushed a change to keep the color profile so that the colors remain beautiful[1].

1: https://i.redd.it/0cy4xmpito4x.jpg

Comment by [deleted] at 21/06/2016 at 16:40 UTC

19 upvotes, 0 direct replies

Looks like it's removing the images color profile. Your Flickr image has Adobe RGB but the Reddit Media image does not.

Comment by worm929 at 21/06/2016 at 16:30 UTC

22 upvotes, 2 direct replies

oh wow, that's a HUGE downgrade in image size and quality.

what happens if you upload it to imgur?

Comment by dodgy-stats at 21/06/2016 at 17:39 UTC

3 upvotes, 0 direct replies

The Flickr image contains an embedded color profile which is being removed by Reddit's metadata stripping function. They should change their thumbnail creation function to correctly preserve the color profile.

If you want consistent colors on the web I would recommend setting photoshop's (or the tool of your choice) color space to sRGB before exporting the image as a JPEG.

Comment by Drunken_Economist at 21/06/2016 at 16:48 UTC

5 upvotes, 0 direct replies

That's not a reddit image uplaod though, that's the thumbnail/preview thing . . .

Comment by Wodashit at 21/06/2016 at 16:59 UTC

2 upvotes, 1 direct replies

Highjack, That's a nice picture, love the composition and the light fellow pentaxian!

BTW it lists the 28mm 2.8 is it the A or the F, because it list 1.7 as aperture so I am slightly confused? (I always loved the 28 A).

Comment by [deleted] at 22/06/2016 at 01:52 UTC

2 upvotes, 0 direct replies

Asking exactly the question I was going to ask. Compression on imgur was terrible, it forced me to use Flickr for everything if I wanted any semblance of detail left when I uploaded it.

Comment by oonniioonn at 21/06/2016 at 17:14 UTC

2 upvotes, 0 direct replies

This is a common problem with re-compressed images if the original colour profile is removed and the image isn't adjusted for it.

Comment by Denroll at 21/06/2016 at 16:59 UTC

2 upvotes, 0 direct replies

That's a badass pic. Even on my craptastic work monitor (4:3 master aspect ratio!) I can clearly see the difference.

Comment by rlbond86 at 21/06/2016 at 19:10 UTC

2 upvotes, 0 direct replies

Higashiyama ward! Nice pic.

Comment by patssle at 21/06/2016 at 17:04 UTC

2 upvotes, 1 direct replies

Oh you again. :)

Comment by dylmye at 21/06/2016 at 16:33 UTC

1 upvotes, 0 direct replies

I don't know if this helps you but I'm pretty sure they use imgix for processing