sploo wrote in post #18383081
From: https://photography-on-the.net …showthread.php?p=18383016
Would it be possible for the forum software to avoid recompressing small (<=1280 pixels wide) JPEG images uploaded by users, where the file size is below some agreed level?
The example referenced above took a ~400KB file down to ~386KB, but at the expense of a fair bit of damage - which seems to me like the wrong decision in terms of storage space vs image quality.
Thanks for the input.
See https://photography-on-the.net …showthread.php?p=17983597 for a detailed explanation how we save uploaded images.
To not compress is not an option, even with small originals, sorry. 80% seems good for quality and loading speed. There is no point serving 400Kb+ images as there might be dozens on one thread page. Gallery pages in Flickr or GoDaddy are different type of page environments (one large image per page). Re-compression is also one form of security, as it "mangles" the original image bytedata.
I can of course see what can be improved the resize algorithms, and perhaps tune compression % with image size, but that is definitely something that does not happen in near future. The Robidoux settings are very good overall as the test photos in the post I liked to shows.
Also, all modern browsers do things to page's resized images, viewing the uploads at 100% (click the glasses) when browser zoom is at 100% is the only situation I make my decisions on.
And please note that all the above handles only images that are uploaded here, embedded photos are not touched in any way.