login info join!
Forums > Digital Art and Retouching > Sharpening and Clarity Search   Reply
Photographer
Cover Shot Images
Posts: 55
Seattle, Washington, US


Hi guys,
recently I've started looking at some of my images I've posted on other forums and noticed that when submitting them they end up looking "jagged"
Aug 29 13 10:04 am  Link  Quote 
Retoucher
Peano
Posts: 4,106
Lynchburg, Virginia, US


Cover Shot Images wrote:
Hi guys,
recently I've started looking at some of my images I've posted on other forums and noticed that when submitting them they end up looking "jagged"

Aug 29 13 10:14 am  Link  Quote 
Photographer
Cover Shot Images
Posts: 55
Seattle, Washington, US


After. on my comp screen they're fine after post photography.
Aug 29 13 10:47 am  Link  Quote 
Retoucher
Peano
Posts: 4,106
Lynchburg, Virginia, US


Cover Shot Images wrote:
After. on my comp screen they're fine after post photography.

OK. What are the pixel dimensions of an image before you upload, and after you upload it?

Aug 29 13 11:04 am  Link  Quote 
Photographer
Cover Shot Images
Posts: 55
Seattle, Washington, US


Pre submission the dimensions are 676 x 1016 pixels with resolution of 240.
Post submission the dimensions are the same with a resolution of 72.

It looks like it was compressed on FB when posted so could that be it?
Aug 29 13 11:50 am  Link  Quote 
Retoucher
Peano
Posts: 4,106
Lynchburg, Virginia, US


Cover Shot Images wrote:
It looks like it was compressed on FB when posted so could that be it?

Most likely. The resolution -- 240 vs. 72 -- doesn't mean anything, but they're doing something to screw it up. You might check image size (in kilobytes) before and after and see how much that's changing.

Aug 29 13 12:12 pm  Link  Quote 
Photographer
Redcrown
Posts: 151
West Des Moines, Iowa, US


Every forum does it's own thing when you upload to their site. Facebook is the worst. They compress to about the equivalent of Photoshop's level 2. The destruction of the image is significant, and more so depending on the original quality.
Aug 29 13 01:06 pm  Link  Quote 
Retoucher
LightFeatherRetouch
Posts: 445
Bratislava, Bratislavsk√Ĺ, Slovakia


Each website may or may not use a compression algorithm.

Well some actually sharpen the hell out of it, weather you like it or not, others use a compression with a big deal of quality loss.

For most websites, if you submit in the maximum size they allow, they often leave your photo alone. (some however will still apply quality loss compression even if the dimensions are fine).

In order to understand if it has been compressed or not, check image size (KB size) before and after.
Sep 04 13 02:39 pm  Link  Quote 
  Search   Reply