Originally Posted by Kevin@rsp
If I have to save a photo as a jpeg I notice their are 3 options: Baseline standard, Baseline optimized, and progressive. I've always used standard but wondering if one is better than another.
There are lots of technical answers, but the real world answer is that the Baseline standard method will open in virtually all products and browsers, but you can have problems with the other two. So its best to stick with the baseline standard. The progressive mode is interesting because on some browsers the photo will be loaded a bit at a time. You see a lower rez image appear and then it will get better and better. That is assuming the browser can handle progressive JPG. The baseline optimized will give you 2 to 6% smaller file size, but at the cost of extra processing time on both ends and a lower compatibility, as already mentioned. I have never found either of the later two to be worth working with, and so always use the standard.
Here is a link for some teckie details on the subject: