What do these options mean when you store jpeg?

After many people use Photoshop to finish their photos, they usually store the files in JPEG for easy display on the Internet. While in storage, PS will provide some options for you to fine-tune the picture, in addition to "Image options" where you can choose the quality, there is another one called "Format options", what is the difference between the two?

After many people use Photoshop to finish their photos, they usually store the files in JPEG for easy display on the Internet. While in storage, PS will provide some options for you to fine-tune the picture, in addition to "Image options" where you can choose the quality, there is another one called "Format options", what is the difference between the two?

In fact, the function of this choice is mainly to change the image in the browser performance mode:

1) Baseline ("Standard")

This is the most basic format, all browsers will support, choose this is generally not a problem.

2) Baseline Optimized

This version will slightly improve the quality of the image, while the file will become lighter, compress more 2-8%, and most browsers will support it, except for some early problems such as Netscape.

3) Progressive (3/4/5)

The first two files, will be in the browser after the full download of the image, this format will be divided into several layers, the image will download the version of the low solution, and then a little clearer, and finally the full display (number of levels to indicate how many layers). Do you remember a long time ago, such as the 56K age, to download a picture need to wait for a while? Many pictures at that time are progressive, see the first layer is not the road, immediately will turn the page it? Really feel interesting, will wait until the full display.

Which one should we choose?

This depends on your needs, the general use, many people will choose baseline optimized, because in the broadband age, lightweight and good quality JPEG is believed to be more important, but also some users are concerned about the low speed of the site/user, then you can choose progressive Format it.