Does decoding jpeg images uncompresses them?

1. What does JPEG decoding mean?
2. What is image decoding?
3. How much does JPEG compress?

What does JPEG decoding mean?

JPEG Decoding process. The JPEG decoder takes a JPEG image and converts it to a (uncompressed) bitmap using a decoding method called the baseline decoding process.

What is image decoding?

Image decoding is the process of converting the encoded image back to a uncompressed bitmap which can then be rendered on the screen. This involves the exact reverse of the steps involved in encoding the image.

How much does JPEG compress?

JPEG typically achieves 10:1 compression with little perceptible loss in image quality. Since its introduction in 1992, JPEG has been the most widely used image compression standard in the world, and the most widely used digital image format, with several billion JPEG images produced every day as of 2015.